Reference Guide for the Model XM128 ISDN Digital Modem NETGEAR, Inc. A Bay Networks Company 48105 Warm Springs Blvd.
© 1997 by NETGEAR, Inc. All rights reserved. Trademarks Bay Networks is a registered trademark of Bay Networks, Inc. NETGEAR and FirstGear are trademarks Bay Networks, Inc. Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation. Other brand and product names are trademarks of their respective holders.
Bestätigung des Herstellers/Importeurs Es wird hiermit bestätigt, daß das Model NETGEAR Model XM 128 ISDN Digital Modem gemäß der im BMPT-AmtsblVfg 243/1991 und Vfg 46/1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben einiger Geräte (z.B. Testsender) kann jedoch gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der Betriebsanleitung.
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Reference Guide for the Model XM128 ISDN Digital Modem Contents Preface Purpose ..........................................................................................................................xvii Conventions ................................................................................................................... xviii Special Message Formats ....................................................................................... xviii Use of Enter, Type, and Press .....................
Reference Guide for the Model XM128 ISDN Digital Modem Chapter 4 Configuration Configuring Your ISDN Line and Network ......................................................................4-1 Configuring Your Modem Using a Terminal Program .....................................................4-1 Understanding AT Commands .................................................................................4-2 Quick Tips for Issuing AT Commands ................................................................
Reference Guide for the Model XM128 ISDN Digital Modem Commands for Incoming Calls ........................................................................................6-4 Digital Data ...............................................................................................................6-4 Determining the Packet Length ................................................................................6-5 Answering a Call Using MSN ....................................................................
Reference Guide for the Model XM128 ISDN Digital Modem Chapter 7 Advanced ISDN Call Control for DSS1 .....................................................................................................7-1 Control of Outgoing Service Indicator ......................................................................7-2 Control of ISDN Phone Numbers and Subaddresses ..............................................7-3 Call Control for 1TR6 (Old German ISDN) .........................................................
Reference Guide for the Model XM128 ISDN Digital Modem Chapter 10 Troubleshooting Power-on Self-test ........................................................................................................10-1 Loopback Tests .............................................................................................................10-2 ISDN Loopback test (AT&T9) .................................................................................10-2 Loopback with Self-test (AT&T10) ...........................
Reference Guide for the Model XM128 ISDN Digital Modem Appendix D Status Registers and Result Codes Viewing and Setting S-Registers ................................................................................... D-1 Setting S-Registers ................................................................................................. D-2 Examples for Setting S-Registers ..................................................................... D-2 S-Register Descriptions .......................................
Figures Figure 1-1. Front panel of the Model XM128 modem (with S/T interface) ..................1-3 Figure 1-2. Front panel of the Model XM128 modem (with U interface) .....................1-4 Figure 1-3. Rear panel of the Model XM128 modem (with S interface) .....................1-6 Figure 1-4. Rear panel of the Model XM128 modem (with U interface) .....................1-6 Figure 2-1. Model XM128 modem connections ..........................................................2-2 Figure E-1.
xii Figures
Tables Table 1. Manual contents ........................................................................................xix Table 2. Manuals ................................................................................................... xx Table 1-1. Interface options ......................................................................................1-3 Table 1-2. LED descriptions ......................................................................................1-4 Table 1-3.
xiv Table 7-1. S-register values and functions ................................................................7-2 Table 7-2. Outgoing low-layer compatibility commands ............................................7-3 Table 8-1. Frequently used AT commands ................................................................8-2 Table 8-2. Frequently used AT commands (European switches) ..............................8-2 Table 9-1. Definitions for the d modifier ............................................
Table E-1. RJ-45 plug and RJ-45 connector pin assignments for the S/T interface . E-2 Table E-2. RJ-45 plug and RJ-45 connector pin assignments for the U interface .... E-2 Table E-3. RJ-11 connector pin assignments ........................................................... E-3 Table F-1. Serial port interface ..................................................................................F-1 Table F-2. Asynchronous flow control cable connection ...........................................
xvi Tables
Preface Congratulations on your purchase of the NETGEAR™ Model XM128 ISDN Digital Modem. The NETGEAR Model XM128 modem provides connection for one or more PCs to the Internet or to the office over ISDN (Integrated Services Digital Network) lines.
Reference Guide for the Model XM128 ISDN Digital Modem Conventions This section describes the conventions used in this guide. Special Message Formats This guide uses the following formats to highlight special messages. Note: This format is used to highlight information of importance or special interest. Caution: This format is used to highlight information that will help you prevent equipment failure or loss of data.
Reference Guide for the Model XM128 ISDN Digital Modem Other Conventions This guide uses the following additional conventions: italics Book titles and UNIX file, command, and directory names. courier font Screen text, user-typed command-line entries. Initial Caps Menu titles and window and button names. [Enter] Named keys in text are shown enclosed in square brackets. The notation [Enter] is used for the Enter key and the Return key.
Reference Guide for the Model XM128 ISDN Digital Modem Table 1. Manual contents (continued) Getting Started Using FirstGear for the Model XM128 ISDN Digital Modem Subject Reference Guide for the Model XM128 ISDN Digital Modem Assigning multiple subscriber numbers Chapter 3 Chapter 5 (For using AT commands when assigning multiple subscriber numbers.) Assigning protocols Chapter 3 Chapter 4 and Chapter 5 (For using AT commands when assigning protocols.
Chapter 1 Introduction Congratulations on your purchase of the NETGEAR Model XM128 ISDN Digital Modem. The Model XM128 modem sets a new price and performance standard for the rapidly growing Internet and telecommuting applications. When used with off-the-shelf Internet or remote access client software, the Model XM128 modem enables mobile or home users to easily connect to the Internet or branch offices over Integrated Services Digital Network (ISDN) lines.
Reference Guide for the Model XM128 ISDN Digital Modem The Model XM128 modem has two analog ports to connect analog devices such as fax machines, modems, and telephones. Two different devices can communicate over the two B channels to different locations simultaneously, enabling you to send a fax and make a voice call at the same time. The analog ports recognize standard dual-tone multifrequency (DTMF) tones as well as pulse dialing.
Reference Guide for the Model XM128 ISDN Digital Modem Interface Options Several interfaces are available. Table 1-1 lists the interface options for the Model XM128 modem as applicable for each region. Table 1-1.
Reference Guide for the Model XM128 ISDN Digital Modem 1 2 U INTERFACE 128Kpbs 3 4 MODEL ISDN Digital Modem PWR D B1 B2 ISDN AA CP DTR DSR RTS CTS COM TD RD 1 XM128 2 7847MEA Key: 1 = PWR (power) LED 2 = ISDN LEDs 3 = RS-232 COM LEDs 4 = PHONE 1 and PHONE 2 LEDs Figure 1-2. Front panel of the Model XM128 modem (with U interface) LEDs on the front panel of the Model XM128 modem allow you to monitor and diagnose the device. Table 1-2 describes each LED. Table 1-2.
Reference Guide for the Model XM128 ISDN Digital Modem Table 1-2. Label LED descriptions (continued) Color Activity Description Green On The data terminal or computer connected to the COM port on the Model XM128 modem is ready to communicate. DSR On The Model XM128 modem is ready to communicate with the connected data terminal or computer. RTS On The data terminal or computer connected to the COM port on the Model XM128 modem is ready to transmit data.
Reference Guide for the Model XM128 ISDN Digital Modem Rear Panel As illustrated in Figure 1-3 and Figure 1-4, the rear panel contains a power switch, a power receptacle, and ports to connect a computer, ISDN line, and two analog devices (phone, fax, or modem).
Reference Guide for the Model XM128 ISDN Digital Modem Table 1-3 describes the components on the rear panel of the Model XM128 modem. Table 1-3. Rear panel components Label Description ON/OFF This switch turns power on or off. POWER This is the power receptacle for the power adapter. RS-232 This RS-232 COM port is for connecting the Model XM128 modem to the serial port of a computer or data terminal. ISDN This port is for connecting the RJ-45 connector of an ISDN line.
Chapter 2 Installation This chapter information about installing and using the Model XM128 ISDN Digital Modem. Package Contents Your package should contain the following items: • Model XM128 ISDN Digital Modem • Power adapter • RJ-45 ISDN telephone cable • Shielded RS-232 25-pin to 25-pin cable • 25-pin to 9-pin adapter • This manual • Getting Started Using FirstGear • CD ROM with bundled software • 3.
Reference Guide for the Model XM128 ISDN Digital Modem To qualify for product updates and product warranty registrations, fill in the Warranty and Owner Registration Card within 30 days of purchase and return it to NETGEAR, Inc. Installing the Modem Before connecting any of the devices to your modem, make sure the power is turned off on your computer and your Model XM128 modem.
Reference Guide for the Model XM128 ISDN Digital Modem To install your Model XM128 modem, follow these steps: 1. Connect the male end of the 25-pin cable to the RS-232 COM port of the Model XM128 modem. 2. Connect the other end of the 25-pin cable (female end) to the serial (COM) port on your computer. Note: If your computer has a 9-pin serial connector, use a 25-pin to 9-pin converter (25-pin male to 9-pin female). If you have a Macintosh, a special cable is needed for the connection. 3.
Chapter 3 Setup for Windows 95 and Windows NT 4.0 This chapter contains step-by-step procedures both for installing the Windows NT and Windows 95 drivers and for configuring Dial-Up Networking for the Model XM128 modem. Selecting the Appropriate Windows 95 Driver (INF file) If your computer supports the Plug-and-Play feature, be sure your Model XM128 modem is powered on before starting your computer. If you are using a non-Plug-and-Play protocol, follow the steps to complete installation: 1.
Reference Guide for the Model XM128 ISDN Digital Modem 9. Select the Model XM128 modem driver with the protocol that your host is using. Generally, the following examples work. However, we recommend that you verify the protocol your Internet service provider (ISP) uses. If you are connecting to an Internet service provider (ISP), select: NETGEAR XM128, PPP 64K If the ISP has not upgraded to an ASCEND compatible server, select: NETGEAR XM128 V.
Chapter 4 Configuration This chapter describes the procedures for configuring your Model XM128 modem and your ISDN line. Configuring Your ISDN Line and Network The setup procedure for the Model XM128 modem needs to be done only once. The settings are stored in the nonvolatile random access memory (NVRAM) of the modem. Turning power on and off will not erase the information.
Reference Guide for the Model XM128 ISDN Digital Modem The setup procedure for the Model XM128 modem needs to be done only once because the settings are stored in the nonvolatile RAM of the modem and turning the power off does not erase the information. The only time you have to reconfigure your line is when you perform a hardware reset or when you change options on your ISDN line.
Reference Guide for the Model XM128 ISDN Digital Modem In order to issue an AT command statement, you first need to run your communications software and configure it to the port connected to the Model XM128 modem. Refer to your communications software manual for more information. Table 4-2 lists the supported AT command types. Table 4-2.
Reference Guide for the Model XM128 ISDN Digital Modem Table 4-3 lists the commands for viewing both the numerical and verbose result codes. Table 4-3. Result codes commands Command Description ATV0 Select numerical result code ATV1 Select verbose result code Using AT Commands to Verify Modem Response Use AT commands to make sure the Model XM128 modem responds, and follow these steps: 1. Type the command AT and press [Enter]. You should receive the following response: OK 2.
Reference Guide for the Model XM128 ISDN Digital Modem Switch Type Setup for North America In North America, the popular types of switches are AT&T 5ESS, Northern Telecom DMS100, and Siemens EWSD. All of these switches run software that either conforms to the National ISDN-1 standard or a custom version. The Model XM128 modem supports the six different combinations listed in Table 4-4. The value for n in the ATPn command is shown in the AT command column.
Reference Guide for the Model XM128 ISDN Digital Modem SPID Setup for North America SPID numbers are needed unless your switch type is AT&T 5ESS with Point-to-Point Protocol. The ISDN switches use SPID numbers to represent the subscribed network services. Each SPID corresponds to one terminal end point identifier. Different switches might provide different rules for the SPID number format. You should get the SPID number from your local telephone company.
Reference Guide for the Model XM128 ISDN Digital Modem Entering DNs You will need to enter the phone numbers given to your ISDN line. The phone numbers will be cleared whenever the switch type is changed. 1. Type ATDN0=n and [Enter]. Where n is the 7-digit phone number. You should receive the following response: OK 2. Type ATDN1=n [Enter]. Where n is the second 7-digit phone number. You should receive the following response: OK 3. Type AT&W0Z0 and [Enter] to save the settings.
Reference Guide for the Model XM128 ISDN Digital Modem Table 4-5. AT commands for setting protocols Protocol AT command X.75 ATB00&O2 V.110 user rate - 38400 bps ATB18&O2 V.120 ATB20&O2 PPP ATB40&O2 For example, if the protocol you want is PPP, type the command ATB40&O2. For other X.75 or V.110 protocol options, refer to Appendix C, “AT Command Set Reference.” 6. Assign the appropriate MSN telephone numbers, using the AT commands in Table 4-6. Table 4-6.
Chapter 5 Async to Sync PPP This chapter describes the application of asynchronous to synchronous HDLC conversion. Internet and Remote Access PPP and SLIP More and more Internet Service Providers are offering their services through dial-up ISDN lines for higher data bandwidth. The equipment used by your service provider frequently consists of ISDN LAN routers which, unlike a digital modem, do not have asynchronous capability. For this reason, terminal adapters that support only V.
Reference Guide for the Model XM128 ISDN Digital Modem Most of the time, you only use this protocol for making calls to remote sites with ISDN LAN Routers. If the remote access site you are calling uses a Terminal Adapter such as the Model XM128 modem, you can use V.120, as it provides data compression. Before making the call, check which protocol is set for the ISDN mode using the &V command to view the settings.
Reference Guide for the Model XM128 ISDN Digital Modem Answering Async to Sync PPP calls There is no need to configure the ISDN mode to the protocol of an incoming call. If it is set to auto-answer or an answering command is issued, the Model XM128 modem determines the correct protocol to use by examining the data coming in from the remote site. One exception is when the ISDN data call is carried through a Speech bearer.
Reference Guide for the Model XM128 ISDN Digital Modem Dialing Pre-stored Phone Numbers The ATDSn command, n=0,1,..,39, dials the (n+1)th phone number twice for both of the Multilink PPP connections. The command ATDSn+Sm, (n and n=0,1,...,39) dials the (n+1)th phone number for the first connection and the (m+1)th phone number for the second connection. Example: ATDIS0+S1 [Enter] dials the number stored in location 0, and the number stored in location 1 for the MPPP connection.
Reference Guide for the Model XM128 ISDN Digital Modem Each Octet_i is in the range from 0 to 255. The angle brackets (<) and (>) are part of the this command. The command ATEPD? can be used to view current setting of the Endpoint Discriminator Address. Note: The Endpoint Discriminator option is not required in most cases, thus users don't have to change the default settings.
Chapter 6 ISDN Overview This chapter covers the procedures for initiating and receiving calls over digital lines using your Model XM128 ISDN Digital Modem. Commands for Outgoing Calls The Model XM128 modem uses the following three modes to send communication over your ISDN network: • ISDN data • Analog port, PHONE 1 communication • Analog port, PHONE 2 communication These modes are automatically switched based on the commands you issue.
Reference Guide for the Model XM128 ISDN Digital Modem Dialing Out Using ISDN Mode Optional Speech Bearer Service The Model XM128 modem supports ISDN data utilizing Speech Bearer Service. To enable this function, you need to set S-register S83 bit 7 to 1 (ATS83.7=1). This function is useful in the areas where ISDN service providers charge lower usage rates for voice (speech) calls. To enable this function, enter: ATS83.7=1 To disable it, enter: ATS83.
Reference Guide for the Model XM128 ISDN Digital Modem Conventional dialing commands ATD, ATDT, and ATDP, used by much of the existing communication software, can be mapped onto one of the new dialing commands according to the AT&O setting as shown in Table 6-1. Table 6-1. Dialing commands AT Command Dial string it maps to AT&O0 ATD, ATDT, and ATDP are the same as ATDB. AT&O2 ATD, ATDT, and ATDP are the same as ATDI. AT&O3 ATD, ATDT, and ATDP are the same as ATDA.
Reference Guide for the Model XM128 ISDN Digital Modem Commands for Incoming Calls When a call comes in, the call is carried by one of the following protocols: • V.120 • HDLC PPP, MPPP, or SLIP • V.110 • X.75 Or the call may be initiated by an analog device. This section provides some general guidelines for setting up the Model XM128 modem for call answer handling. Be aware that the modem does not automatically answer a call unless S-register S0 is set to a value greater than 0 (zero).
Reference Guide for the Model XM128 ISDN Digital Modem Determining the Packet Length The user’s information is sent on a frame-by-frame basis for V.120 and X.75, sometimes called packetized. The maximum frame length on the sending side should not exceed the maximum frame length that the receiving side allows. Sometimes this information is exchanged during handshaking. However, few manufacturers, if any, have implemented this mechanism.
Reference Guide for the Model XM128 ISDN Digital Modem Answering a Call Using MSN When answering an incoming call, the call is first identified if the caller number matches the Multiple Subscriber Number (MSN) settings. The MSN supplementary service enables multiple ISDN numbers to be assigned to a single ISDN BRI line. It allows the caller to select, through the public network, one or more distinct terminals from a variety of terminal choices.
Reference Guide for the Model XM128 ISDN Digital Modem If an incoming setup message is offered with addressing information (that is, the appropriate part of the Called Party Number), this address is compared with the MSN numbers assigned by the AT&ZIn=s commands. The call is accepted using the specific protocol if the assigned number of this protocol matches the received Called Party Number. Note: You are not required to enter the complete numbering string for the AT&Z command.
Reference Guide for the Model XM128 ISDN Digital Modem If you want the Model XM128 modem to answer inbound calls using all possible protocols, refer to Table 6-4 for the commands used to set the best-effort call answering bit. Table 6-4. Best-effort call answering bit commands Command Function ATS119.3=0 Answer call only when number matched (by default) ATS119.
Reference Guide for the Model XM128 ISDN Digital Modem If the address-matching process is again unable to tell which protocol to use, the Model XM128 modem goes into the Multi Auto-answering Routine by examining the B channel data pattern and, hence, determining the protocol to use.
Reference Guide for the Model XM128 ISDN Digital Modem V.110 ISDN Communications This section describes how to set up and configure your Model XM128 modem with the V.110 Protocol. Answering a V.110 Call After you set the proper V.110 communication mode, there is no need to configure the ISDN mode to the protocol of an incoming call. If the device is set to auto-answer, the Model XM128 modem determines the correct protocol to use by examining the data coming in from the remote site.
Reference Guide for the Model XM128 ISDN Digital Modem The highest asynchronous V.110 user rate depends on bit 4 of S119 as follows: • S119.4=0 (19.2 Kbps) • S119.4=1 (38.4 Kbps for areas other than Japan) • S119.4=1 (57.6 Kbps for Japanese version) If the DTE speed is higher than what has been set, the user rate in Table 6-6 is used. The X bits in the 80-bit frame are used for remote flow control. V.
Reference Guide for the Model XM128 ISDN Digital Modem Answering a V.120 Call In most cases, there is no need to configure the Model XM128 modem to properly answer calls. The Model XM128 modem decides which protocol to use by detecting the type of data that is received. You only need to set S0 to greater than or equal to 1 in order for the modem to automatically answer an incoming call. If S0=0, the DCE simply reports RING to your terminal and sounds a ring notification.
Reference Guide for the Model XM128 ISDN Digital Modem Now you are ready to dial the phone number. If you need to save the setting into NVRAM, use the following commands and follow these steps: 1. Enter AT&W0 (save the settings to profile 0) [Profiles available: 0-3]. Model XM128 modem should respond with: OK 2. Enter ATZ0 (save stored settings as the power on settings to profile 0) [Profiles available: 0-3].
Reference Guide for the Model XM128 ISDN Digital Modem 3. Enter AT&WZ (if you want to save the setting). After these commands are entered, the ATD command generates two consecutive setup messages to invoke bundle initiation. For the Northern Telecom switch, each BRI phone number can be called only once at any given time. So if you dial this number, it reports busy to any other incoming calls. In order to use two B channels for aggregation, you must place two calls with different phone numbers.
Reference Guide for the Model XM128 ISDN Digital Modem 128 Kbps Speeds BRI ISDN consists of three (2B+D) logical channels. Each B channel can be used independently for a dial-up connection running at 56 Kbps or 64 Kbps (bits per second). The two B channels can be used together for a single data connection to provide 112K (with In-Band Signaling) or 128K (when Out-of-Band Signaling is used). It is called a Bundle Connection (different from BONDING). The type of channel bundling described in the V.
Reference Guide for the Model XM128 ISDN Digital Modem Because the V.42bis algorithm needs an error-free transmission channel between the compression and decompression processes, it can only work with a protocol that has error control competence. The X.75 and V.120 protocols can be used together with V.42bis data compression. The V.110 protocol, on the other hand, is just an R-interface layer 1 adaptation protocol without error-control and is thus inadequate for V.42bis. X.
Reference Guide for the Model XM128 ISDN Digital Modem The ATB0x commands not only specify the outgoing protocol, but also set the default layer 3 for an incoming X.75 call without layer 3 information. It is important for both ends of an X.75 connection to execute the same preassigned layer 3 protocol because it reduces the chance of the Model XM128 modem making the wrong protocol selection.
Reference Guide for the Model XM128 ISDN Digital Modem The devices in the two sites then use X.75 Multiple Link Protocol or cFos channel bundling protocol to coordinate the two B channels. The former would need an overhead of 2 octets for each packet. The following is an example of the connect message reported to the DTE. The success of bundle connection initiation is indicated by this message: CONNECT 460800 / X.
Reference Guide for the Model XM128 ISDN Digital Modem Although not defined in X.75, the XID frame is based on the encoding in ISO Standard 8885 and on being used in V.42/V.42bis. In addition to the compression parameters, XID can be used to negotiate such packet parameters as window or packet size. Bundle Connection with V.42bis Data Compression If both sites have set AT&K44 to enable V.
Chapter 7 Advanced ISDN This chapter provides information about using advanced ISDN for the Model XM128 ISDN Digital Modem. Call Control for DSS1 In order to initiate a Digital Subscriber Signaling #1 (DSS1) ISDN call, two information elements are necessary: • The bearer capability element indicates what kind of bearer service is desired. It is also used for compatibility checking in the addressed entity.
Reference Guide for the Model XM128 ISDN Digital Modem Control of Outgoing Service Indicator The high-layer compatibility and low-layer compatibility information provides a means for compatibility checking by the called party. This information is transferred transparently by the ISDN network between the call-originating entity (for example, the calling user) and the addressed entity.
Reference Guide for the Model XM128 ISDN Digital Modem Bearer capability and low-layer compatibility information elements are determined when you configure the B channel protocols using the ATBnn command. The outgoing low-layer compatibility information element can be turned on or off by setting the S80 bit n as follows: • n = 4 for analog adapter 2 • n = 6 for ISDN data calls • n = 7 for the analog adapter 1 Table 7-2 lists the commands for enabling and disabling outgoing low-layer compatibility.
Reference Guide for the Model XM128 ISDN Digital Modem The number-subaddress string s is defined as: s = [[Yn][Nn]own-number][/[[Zn]own-subaddress]/] Yn specifies the type of number: • Y0 for unknown (default if Yn is omitted) • Y1 for international number • Y2 for national number • Y3 for network specific number • Y4 for subscriber number Nn is the identifier of the numbering plan: • N0 for unknown (default if Nn is omitted) • N1 for ISDN numbering plan (Rec. E.
Reference Guide for the Model XM128 ISDN Digital Modem Call Control for 1TR6 (Old German ISDN) In order to initiate a 1TR6 ISDN call, two information elements are necessary: • Service indicator, which determines what kind of bearer services are desired. • Destination address, which provides necessary information for the telephone company central office to direct the call to the remote party.
Reference Guide for the Model XM128 ISDN Digital Modem Control of EAZ (ENDGERÄTEAUSWAHLZIFFER) EAZ (or terminal selection code) is the last digit of an ISDN phone number in 1TR6. Usually EAZ=0 indicates that a global call (any terminal on the S0 interface), which is service-compatible with the incoming call, can answer the call. Other values of EAZ (1,2,....,9) provide the possibility for assigning multiple ISDN numbers to a single ISDN BRI line.
Reference Guide for the Model XM128 ISDN Digital Modem The EAZ (last digit) of the destination address in an incoming setup message is checked with the protocol of each EAZ. If there is a match and the service indicated is compatible with this protocol, the call be accepted using the protocol. Note: The EAZs must be assigned precisely in order to accept calls accordingly.
Reference Guide for the Model XM128 ISDN Digital Modem In some areas, however, it is very expensive to get additional subscriber numbers. The subaddress, which is transferred transparently by the ISDN network between the calling user and the addressed user, can be used for the same purpose as the MSN. Because the Model XM128 modem is highly integrated and multifunctional, it can be thought of as a black box that contains multiple distinct terminals.
Reference Guide for the Model XM128 ISDN Digital Modem If you want the Model XM128 modem to answer inbound calls as often as possible, you can set the best-effort call answering bit as follows: • S119.3=0 for Answering call only when number matched (by default) • S119.
Reference Guide for the Model XM128 ISDN Digital Modem Data Call Indication Data calls are accepted by the Model XM128 modem in the same way as with any terminal adapter.
Reference Guide for the Model XM128 ISDN Digital Modem Point-to-Point Configuration In some areas, the Direct-Dial-In (DDI) number is less expensive than the MSN; therefore, you might want to subscribe to point-to-point ISDN to employ the DDI function. In this case, only one modem can be connected to the ISDN line and the TEI (Terminal Equipment Identifier) is always zero. The TEI is established by setting the bit 1 of S-register S119 as follows: • S119.
Reference Guide for the Model XM128 ISDN Digital Modem Nn is the identifier of the numbering plan for the ATDx command: • N0 for unknown (default if Nn is omitted) • N1 for ISDN numbering plan (Rec. E.164) • N3 for data numbering plan (Rec. X.121) • N4 for telex numbering plan (Rec. F.69) • N8 for national standard numbering plan • N9 for private numbering plan Zn specifies the type of the subaddress: • Z0 for NSAP (Rec. X.
Reference Guide for the Model XM128 ISDN Digital Modem User-To-User Information The Model XM128 modem supports user-to-user information exchange via the D channel. To transmit a message, use the ATT4 command. The angle brackets (< >) are part of this command. The message is included in a user-to-user information element, which is sent with the first valid message that follows. If the ATT4
Chapter 8 Analog Call Handling This chapter outlines the steps required to place and answer analog calls through the ISDN line for your Model XM128 ISDN Digital Modem. The analog adapters enable you to connect analog devices (for example, telephone, fax, or modem) to an ISDN basic rate line.
Reference Guide for the Model XM128 ISDN Digital Modem AT Commands for Analog Calls Table 8-1 lists some of the most frequently used AT commands. Table 8-1. Frequently used AT commands AT Command Description of command ATDAs Automatically dials out for device connected to PHONE 1. The number string to dial is represented by the letter s. ATDBs Automatically dials out for device connected to PHONE 2. AT&V6 View current setting of analog adapter, PHONE 1.
Reference Guide for the Model XM128 ISDN Digital Modem Making and Receiving Analog Calls This section explains the role of analog adapters in placing outgoing analog calls and receiving incoming analog calls. Placing a Call from the Analog Adapter Making a call from the analog adapter is as easy as picking up the telephone connected to the analog port and dialing. With a terminal program, you can also use the Model XM128 modem to dial the number for you.
Reference Guide for the Model XM128 ISDN Digital Modem Accepting an Incoming Call Incoming ISDN calls are directed to one of the analog ports (PHONE 1 or PHONE 2) if: • A voice call is sent to one of the two analog adapters automatically when it is received. As the manufacturer default, the call is sent to the analog adapter, PHONE 1, first then PHONE 2 if PHONE 1 is busy.
Chapter 9 Modem Upgrade This chapter describes how to upgrade flash electrically erasable programmable read-only memory (EEPROM) firmware on your Model XM128 ISDN Digital Modem. Upgrading with Flash EPROM Your Model XM128 modem employs a flash EEPROM that lets you conveniently download updated firmware and program the modem with new features and enhanced functions. If you are using Windows 95 or Windows NT, use the NETGEAR Internet Configuration Manager to upgrade the firmware.
Reference Guide for the Model XM128 ISDN Digital Modem Upgrade Instructions To upgrade your Model XM128 modem, turn the modem on and follow these steps: 1. Start any communications program that supports the X-modem Protocol. 2. Enter the command ATUPX. Your Model XM128 modem responds: You have chosen Xmodem (128 octets of data with checksum) protocol to update your ISDN modem. Data in Flash ROM will be erased !!! Are you sure (Y/N) ? 3. Press Y.
Chapter 10 Troubleshooting This chapter provides quick easy-reference troubleshooting tables for the Model XM128 ISDN Digital Modem. For troubleshooting purposes, the Model XM128 modem performs its own diagnostic tests, which can provide information about each of its functions.
Reference Guide for the Model XM128 ISDN Digital Modem Note: The LED lights up during the test and blinks if the test fails. The LNK LED light s up for a half second to indicate the success of the power-on self-test. Then the LNK LED becomes the normal physical layer (layer 1) active indicator. Loopback Tests The Model XM128 modem performs several loopback tests as part of its diagnostic capabilities. ISDN Loopback test (AT&T9) The AT&T9 command invokes an ISDN loopback test connection.
Reference Guide for the Model XM128 ISDN Digital Modem B1/B2 Loopback with Self-test An AT and T11 command is designed for testing the readiness of your ISDN line that uses one B channel (B1) to place a call to itself and uses the other B channel (B2) to receive the call. This test is a modem loopback test. To make your test call, follow these steps: 1. Enter the command AT&ZOI=your_isdn_number. Your Model XM128 modem responds with: OK 2. Enter the command AT&T11.
Reference Guide for the Model XM128 ISDN Digital Modem Dialed digits detected, please hang-up the handset….!! On-hook action is detected, (Hook Interrupt)........ OK Listen to the RING and then pick up phone set #2 ....!! Off-hook action is detected, (Hook Interrupt) ....... OK Listen to the dial tone and then dial 1234567890*# in quence.!! 1234567890*# Dialed digits detected, please hang-up the handset ..!! On-hook action is detected, (Hook Interrupt) ........
Reference Guide for the Model XM128 ISDN Digital Modem Setting up the Embedded EPA The EPA records and analyzes various protocols on the B channel, D channel and DTE-DCE interface. The results are displayed with ANSI color. This professional tool is designed for hobbyists as well as users with technical backgrounds. The EPA enables you to examine messages exchanged between your Model XM128 modem and the Central Exchange office when making an ISDN call.
Reference Guide for the Model XM128 ISDN Digital Modem The DTE-DCE protocols (at the R reference point according to the ISDN nomenclature) include the AT commands/responses as well as the CAPI internal interface. The CAPI internal interface is used with NETGEAR CAPI driver. The NETGEAR CAPI driver communicates with the Model XM128 modem through this internal interface. It is not recommended that users get involved in this internal interface.
Reference Guide for the Model XM128 ISDN Digital Modem The analyzed results can be viewed as if contained in a full screen editor. Several number keys are used to control the display. For PC users, it is convenient to use the keys on the numeric keypad (make sure that Num-Lock is on.). The functions of the control keys are listed in Table 10-4. Any other key pops up the control menu. Table 10-4.
Appendix A Technical Specifications This appendix provides the technical specifications for the Model XM128 ISDN Digital Modem. General Specifications Network Protocols and Standards Compatibility WAN Protocols: Multilink PPP, BACP, PPP V.120, V.110, X.
Reference Guide for the Model XM128 ISDN Digital Modem Data Compression Hi/fn LZS (Stac) Compression with CCP V.42bis Power Adapter 16 V, 1A (22W max.) UL/CSA (North America) CE/TUV (Europe) TMark (Japan) Physical Specifications Dimensions: 190 x 122 x 31 mm 7.5 x 4.8 x 1.2 in. Weight: 0.7 kg 1.6 lb Environmental Specifications Operating temperature: 0° C to 40° C Operating humidity: 90% max.
Appendix B Security Functions This appendix describes the security functions of the Model XM128 ISDN Digital Modem. The modem provides two types of security functions that may be enabled to prevent unauthorized connections. Security Types and Levels The Model XM128 modem provides the following types of security: • Type 1 security is used when the remote modem is a NETGEAR modem. • Type 2 security is used when the remote modem is a non-NETGEAR device.
Reference Guide for the Model XM128 ISDN Digital Modem The two types of security are summarized in Table B-1. Table B-1. Types of security Type 1 Security Type 2 Security Remote (Calling) Site NETGEAR ISDN device only Can be modem of any brand Password Check Automatic Interactive Protocols Supported X.75, V.
Reference Guide for the Model XM128 ISDN Digital Modem Level 3 Security After the password is matched, the local modem prompts the remote user to enter a callback number. The three levels of security are summarized in Table B-2. Table B-2. Levels of security Level 1 Level 2 Level 3 Password Check Yes Yes Yes CPN Check OK and S119.6=0 N/A Call back CPN Check OK and S119.
Reference Guide for the Model XM128 ISDN Digital Modem You are asked to enter the original password, to enter a new password, and then to reenter the new password for verification. For example, you are prompted with the following: Password: Enter the current supervisory password at this prompt. You are then prompted for a new password. Password: Enter the new supervisory password at this prompt. You are then prompted to verify the new password.
Appendix C AT Command Set Reference This appendix provides information for using AT commands for the Model XM128 ISDN Digital Modem. Operation Mode of the DTE Interface The operation mode for the DTE interface is Simplex mode. This mode is used for conventional AT command operation. Simplex Mode In simplex mode, the Model XM128 modem is used just like an ordinary modem. The DTE interface is either in the command state or in the data state. Only one data connection session is possible at any time.
Reference Guide for the Model XM128 ISDN Digital Modem AT Command Descriptions The AT command is a command in asynchronous data format issued by the computer to the Model XM128 modem through the asynchronous computer-modem interface. AT commands control the behavior and actions of the modem. To send an AT command from a computer to the Model XM128 modem, the following rules apply: • You must be running a communication software. • The modem must be in the command state.
Reference Guide for the Model XM128 ISDN Digital Modem Table C-1. Command Basic AT command set (continued) Options Bnn Function and description Select ISDN Teleservice. B must be followed by two digits. See also S-registers 82 and 102. For a description of Extended S-registers, refer to Table D-4 on page D-5 in Appendix D, “Status Registers and Result Codes." B00 X.75 Transparent B01 X.75 T.70 B04 BTX (Data X-J) B10 V.110 user rate follows DTE speed (async) or V.
Reference Guide for the Model XM128 ISDN Digital Modem Table C-1. Command Basic AT command set (continued) Options CPn Function and description Loopback 4 control CP0 Disable Loopback 4 CP1 Enable Loopback 4 CRn n=0-3 0* Resumes a previously suspended call; n is the call identifier (Europe). CSn n=0-3 0* Suspends a call; n is the call identifier (Europe). Ds Dial s numbers and options that follow. See also S-register 38.0 and 35.4.
Reference Guide for the Model XM128 ISDN Digital Modem Table C-1. Command Basic AT command set (continued) Options Function and description DAs Dial s (number and options) that follows for the analog adapter, PHONE 1. DBs Dial s (number and options) that follows for the analog adapter, PHONE 2. DIs Dial s (number and options) that follows for ISDN data call. DL Repeat last ATD command. DNn=m DN0= DSn DN1= Second phone number (m=seven-digit phone number for North American switches).
Reference Guide for the Model XM128 ISDN Digital Modem Table C-1. Basic AT command set (continued) Command Options Function and description JSn n=0-255 *32 Sub-threshold for MPPP in Kbps unit KAxn n=0-63 *0 Add-persist time interval for BOD; BOD disabled if n=0 x= M(in Minute unit) or S(in Second unit) KSxn n=0-63 *0 Sub-persist time interval for BOD; BOD disabled if n=0 x= M(in Minute unit) or S(in Second unit) Ln n=0-3 2* Speaker volume control. The higher the value, the higher the volume.
Reference Guide for the Model XM128 ISDN Digital Modem Table C-1. Command Basic AT command set (continued) Options SPIDn=m Function and description User enters Service Profile ID (SPID) m, for USA switches. SPID0 First SPID number SPID1 Second SPID number, if any. SPID? Display the SPID setting(s). UPX Download firmware to the flash EPROM using X-modem Protocol. Vn Sets display type for result codes. See also S-register 23.6.
Reference Guide for the Model XM128 ISDN Digital Modem Table C-2 shows the outputs for the AT13 commands. Table C-2.
Reference Guide for the Model XM128 ISDN Digital Modem Table C-3. Command Extended AT& command set (continued) Options &Dn Function and description Data Terminal Ready (DTR) options. See also S-registers 21.6 to 21.7 and 25. For a description of Extended S-registers, refer to Table D-4 on page D-5 in Appendix D, “Status Registers and Result Codes." &D0 Ignore DTR signal; assume DTR is always on. &D1 108.1, DTR OFF-ON transition causes dialing of the default number. See also the command AT*Dn and S48.
Reference Guide for the Model XM128 ISDN Digital Modem Table C-3. Command Extended AT& command set (continued) Options &Knn V.120/X.75 compression control. The command &K must be followed by two digits. See also S-register 83.2. For a description of Extended S-registers, refer to Table D-4 on page D-5 in Appendix D, “Status Registers and Result Codes." &K00 Disables V.42bis. &K44 Enables V.42bis. &Ln Analog port selection during call answering. See also S-register 84.5.
Reference Guide for the Model XM128 ISDN Digital Modem Table C-3. Extended AT& command set (continued) Command Options Function and description &Wn n=0-3 Writes current settings to user profile n in nonvolatile RAM. See also S-register 35.6. For a description of Extended S-registers, refer to Table D-4 on page D-5 in Appendix D, “Status Registers and Result Codes." &Z? &Zn=s Display all the phone numbers stored in nonvolatile RAM.
Reference Guide for the Model XM128 ISDN Digital Modem Table C-4 lists the extended AT* command set. Table C-4. Extended AT* command set Command Options Function and description *Cn n=0-3 Character length, including start, stop and parity bit. See also S-register 15.3 and 15.4. For a description of Extended S-registers, refer to Table D-4 on page D-5 in Appendix D, “Status Registers and Result Codes." *C0 * 10-bit character length. *C1 11-bit character length. *C2 9-bit character length.
Appendix D Status Registers and Result Codes This appendix describes the purpose and application of status registers and result codes for the Model XM128 ISDN Digital Modem. Status registers (S-registers) contain values that determine and reflect how your Model XM128 modem operates and executes commands. You can read the values and change them by using either terminal commands or the panel controls with the same results.
Reference Guide for the Model XM128 ISDN Digital Modem 2. Type the &Vn command AT&Vn to view all of the S-register settings. To view different S-register settings, use the following for n: 3. • 0 for viewing S-register settings for current active profile • 1 to 4 for viewing settings for user profile number (n-1) • 5 for viewing the factory default settings • 6 for viewing the setting of PHONE 1 • 7 for viewing the setting of PHONE 2 Type the command ATSr.
Reference Guide for the Model XM128 ISDN Digital Modem 2. Use Table D-1 to convert the decimal bit value to binary. Table D-1. Binary conversion table Bit Binary value Decimal value Hexadecimal value 0 00000001 1 $01 1 00000010 2 $02 2 00000100 4 $04 3 00001000 8 $08 4 00010000 16 $10 5 00100000 32 $20 6 01000000 64 $40 7 10000000 128 $80 3. Use Table D-2 to perform a logic OR operation with the value to set bit 3 to 1 (binary). Table D-2.
Reference Guide for the Model XM128 ISDN Digital Modem S-Register Descriptions In most bitmapped S-registers, the default bit value is 0 (which is the normal situation) and only the nondefault situation is described. Some reserved bits are for factory use, and the user should not change them. Table D-3 describes each basic S-register. Values followed by an asterisk (*) are the factory default settings. Table D-3.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4 describes each extended S-register. Defaults are indicated by a plus sign (+) in the Default or reference column of the table. Table D-4.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Command Extended S-registers ATSn=x (continued) Bit Decimal Hexadecimal S20= Default or reference DTE speed (bps) auto-detected from AT command +003 0 0 230400 bps 1 1 115200 bps 3 3 57600 bps 4 4 38400 bps 5 5 19200 bps 9 9 9600 bps 11 B 4800 bps 12 C 2400 bps 13 D 1200 bps 14 E 460800 bps 15 F 921600 bps S21= Bitmapped register 1-2 3 4 D-6 Function and description 0 0 Speaker is always off.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Extended S-registers ATSn=x (continued) Function and description Default or reference 0 Assumes that Data Terminal Ready (DTR) is always on. &D0 64 40 108.1, DTR off-on transition causes dial of the default number. &D1 128 80 108.2, DTR off causes the Model XM128 modem to hang up and return to command state. &D2 192 C0 108.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Command Extended S-registers ATSn=x (continued) Bit Decimal Hexadecimal S24= Function and description Default or reference Bitmapped register. 0-1 0-3 0-3 Ring volume control, in increments N0-3 of 1 in decimal value 2 0 0 Ignore S21.1-2 when PHONE 1 keypad is dialed. 4 4 Do not ignore S21-2 when PHONE 1 keypad is dialed. 0 0 Ignore S21.1-2 when PHONE 2 keypad is dialed.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Command Extended S-registers ATSn=x (continued) Bit Decimal Hexadecimal S35= 4 16 10 When Data/Voice is pressed, the Model XM128 modem dials the default number. 7 128 80 Enable extended numerical result codes from 50 -71 when an error corrected connection is made. Use with ATV0 (see result code table). Bitmapped register +000 0 1 1 Repeatedly dialing default number. *Dn S29 3 8 8 DCD on/off sequence follows UNIX &C1 S21.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Command Extended S-registers ATSn=x (continued) Bit S64= Decimal Hexadecimal 0-255 0-FF S80= 4 6 7 D-10 Function and description Default or reference Security callback timer in unit of 1 second. +050 Bitmapped register +000 0* 0 Do not send low-layer compatibility information for PHONE 2 (Model XM128 modem) or internal fax/ modem (2864I).
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Command Extended S-registers ATSn=x (continued) Bit Decimal Hexadecimal S82= 2 4-5 Default or reference ISDN B channel protocol Bn 60 V.120 64000 61 V.120 56000 62 X.75 64000 Transparent 63 X.75 56000 Transparent 64 X.75 64000 T.70 65 X.75 56000 T.70 72 V.110 64000 73 V.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Extended S-registers ATSn=x (continued) Function and description Default or reference Command Bit Decimal Hexadecimal S84= 3 8 8 Displays S-register value in hex format. 4 0* 0 Indicates Caller ID after the 1st RING message. 16 10 Disables Caller ID indication. 0 0 PHONE 1 (Model XM128 modem) &L0 or analog port (2864I) has higher priority for answering an analog call.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Extended S-registers ATSn=x (continued) Command Bit Decimal Hexadecimal Function and description Default or reference S87= 5-6 0* 0 Bundle connection is disabled. &Jn 32 20 Bundle connection is enabled in answer mode only. 64 40 Bundle connection is enabled in call mode only. 96 60 Bundle connection is enabled in both directions.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Command Extended S-registers ATSn=x (continued) Bit Decimal Hexadecimal S104+n= Default or reference Outgoing service additional (for 1TR6 only) information: n=0, analog adapter, PHONE 2 n=2, ISDN data n=3, analog adapter, PHONE 1 1 1 Fernsprechen 2 2 a/b - Dienste 7 7 Daten bertragung 64 Kbps.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Extended S-registers ATSn=x (continued) Function and description Command Bit Decimal Hexadecimal S108+n= (continued) SI=7 0 00 Daten bertragung 64 Kbps (X.75 SLP) 192 C0 Async. V.110 64 40 Extensions of async.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Command Extended S-registers ATSn=x (continued) Bit Decimal Hexadecimal S108+n= Function and description Default or reference High-layer compatibility (Non-1TR6) n=0, analog adapter,PHONE 2 n=2, ISDN data n=3, analog adapter, PHONE 1 0* 0 No high-layer compatibility information element is sent. 1 1 Telephone 4 4 Facsimile Group 2/3 40 28 Teletex service (Rec.F.220) 49 31 Teletex service (Rec.F.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Extended S-registers ATSn=x (continued) Function and description Default or reference Command Bit Decimal Hexadecimal S118= (see AT&ZIn=s) Bit Decimal Hexadecimal 0 0 0 Enables dial-in call. 1 1 Disables dial-in call (dial out only). 0 0 Default B channel line speed is 64 Kbps for ISDN data call. &E0 4 4 Default B channel line speed is 56 Kbps for ISDN data call. &E1 0* 0 Uses 3.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Extended S-registers ATSn=x (continued) Function and description Command Bit Decimal Hexadecimal S119= (continued) 2 0* 0 Disables point-to-multipoint signaling DDI function. 4 4 Enables point-to-multipoint signaling DDI function. 0* 0 Inbound call ignored when no MSN (EAZ) is matched. 8 8 Inbound call accepted using default protocol when no MSN (EAZ) is matched. 0* 0 V.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-4. Command Extended S-registers ATSn=x (continued) Bit Function and description Default or reference 0-FF Add-threshold for BOD in Kbps unit JAn,+48 0-FF Sub-threshold for BOD in Kbps unit JSn,+32 Decimal Hexadecimal S126= 0-255 S127= 0-255 ATXn Result Code Option Table Table D-5 lists the different options available when setting the ATXn command. The default value for n is 5 when the Model XM128 modem is shipped. Table D-5.
Reference Guide for the Model XM128 ISDN Digital Modem Table D-5.
Reference Guide for the Model XM128 ISDN Digital Modem Result Code Chart Symbol Reference Table D-6 lists the result codes. Table D-6.
Reference Guide for the Model XM128 ISDN Digital Modem Result Code Field Descriptions Table D-7 lists the result code field descriptions. Table D-7. Result code field descriptions Field name Possible values Error_Code NONE, ARQ Error_Control LAPB, LAPD, V42 (This field will not show if no error control is negotiated) Data_Compression V42b DCE_Speed All possible DCE speeds supported DTE_Speed All possible DTE speeds supported Protocol Only ISDN protocols are listed here X.75 X.75M (X.
Reference Guide for the Model XM128 ISDN Digital Modem Connect Strings for Error Corrected Connections To enable the following numerical (ATV0) and verbose (ATV1) result codes when an error corrected connection is made, set S35 bit 7 to 1. Example: ATS35.7=1 Table D-8 lists the connect strings. Table D-8.
Appendix E Connector Pin Assignments This appendix describes the connector pinout assignments for the Model XM128 ISDN Digital Modem. The Model XM128 modem features one RJ-45 ISDN connector and two RJ-11 phone connectors.
Reference Guide for the Model XM128 ISDN Digital Modem Table E-1 lists the pin assignments for the RJ-45 plug and RJ-45 connector for the S/T interface. Table E-1. RJ-45 plug and RJ-45 connector pin assignments for the S/T interface Pin Assignment 1 Not connected 2 Not connected 3 RCV + 4 XMT + 5 XMT - 6 RCV - 7 - 48V 8 - 48V RTN Table E-2 lists the pin assignments for the RJ-45 plug and RJ-45 connector for the U interface. Table E-2.
Reference Guide for the Model XM128 ISDN Digital Modem RJ-11 Plug and Connector Figure E-2 shows an RJ-11 plug and an RJ-11 connector. 1234 4 1 7895MFA Figure E-2. RJ-11 plug and RJ-11 connector Table E-3 lists the pin assignments for RJ-11 plugs and the RJ-11 connectors for the PHONE 1 and PHONE 2 ports. Table E-3.
Appendix F Serial Port Interface This appendix provides information about the serial port interface for the Model XM128 ISDN Digital Modem. RS-232 Serial Interface Table F-1 describes the RS-232 25-pin serial port interface for the Model XM128 modem. Table F-1. Serial port interface Pin number ITU-TSS signal name EIA signal name Signal/pin description Signal direction DTE -DCE 1 101 AA Protective ground (GND). ¤ 2 103 BA Transmitted data (TXD). ? 3 104 BB Received data (RXD).
Reference Guide for the Model XM128 ISDN Digital Modem Table F-1. Serial port interface (continued) Pin number ITU-TSS signal name EIA signal name Signal/pin description Signal direction DTE -DCE 22 125 CE Ring indicator (RI). ‹ 24 113 DA Transmit clock signal (source: DTE). ? 25 142 Test indicator. ‹ Asynchronous Cable Connections Table F-2 provides information about the asynchronous flow control cable connection. Table F-2.
Appendix G ISDN Reference This appendix explains ISDN technical terms. The appendix also provides you with forms to assist you when working with your local telephone company to set up ISDN services to use with your Model XM128 ISDN Digital Modem. ISDN Overview ISDN is a global system that provides a variety of high-speed digital communication solutions, while maintaining compatibility with existing analog voice, modem, data, and fax protocols.
Reference Guide for the Model XM128 ISDN Digital Modem Basic Rate Interface When you order a Basic Rate Interface (BRI) ISDN line, you receive what is known as the 2B+D service. This service provides two B channels that can transmit at 64 Kbps per channel for user information and a D channel that can communicate between the user and the ISDN network at 16 Kbps. The D channel is used to manage communication between the equipment and the switch.
Reference Guide for the Model XM128 ISDN Digital Modem The B channels are used for carrying user communication information, which can be data, voice, or fax. Voice and analog data must be sent on the B channels. Unlike the asynchronous communications between most PCs and your Model XM128 modem, the B channel operates in synchronous mode. In order to convert the asynchronous communication to synchronous communication, it is necessary to use a Rate Adaption Protocol. In North America, the V.
Reference Guide for the Model XM128 ISDN Digital Modem Not all the interfaces must exist in actual implementations. For example, not all houses are equipped with a PBX (NT2). In this case, the U interface is provided by the NT-1 device. An ISDN terminal adapter can be constructed with the functionality of an NT-1 device. In this case, the terminal adapter connects directly to the U interface.
Reference Guide for the Model XM128 ISDN Digital Modem • Make sure the telephone company provides you with: – The switch type information Ask the telephone company representative which switch type is available in your area. Select the appropriate worksheet in this appendix and complete the information to use as a guide. The three types of worksheets provided are AT& T 5ESS, Northern Telecom DMS-100, and Siemens EWSD.
Reference Guide for the Model XM128 ISDN Digital Modem Order Form for AT&T 5ESS Switch (NI-1 ISDN) To order ISDN service for the AT&T switch, provide the information on this form to your local telephone company by photocopying and faxing this order form.
Reference Guide for the Model XM128 ISDN Digital Modem Order Form for DMS-100 Switch (NI-1 or Custom ISDN) To order ISDN service for the DMS-100 switch, provide the information on this form to your local telephone company by photocopying and faxing this order form.
Reference Guide for the Model XM128 ISDN Digital Modem Order Form for EWSD (NI-1 ISDN) To order ISDN service for the EWSD switch, provide the information on this form to your local telephone company by photocopying and faxing this order form.
Index Numerics 1TR6 communication incoming calls 7-8 outgoing calls 7-5 placing a call 7-12 A address ambiguity 6-8, 7-9 address matching 6-8 ambiguity resolution 7-9 issuing 4-3 MSN 4-8 placing a call 6-3 result codes 4-4 types supported 4-3 V.
Reference Guide for the Model XM128 ISDN Digital Modem D I D channel 10-5, 10-6 incoming calls 6-3, 7-10 data call indication 7-10 installation instructions 2-2 verifying 2-3 data compression 6-15 data over speech channel 6-7 DCA 5-5 diagnostic command 10-3 dialing out for analog adapter port 1 6-2 for analog adapter port 2 6-2 using ISDN mode 6-1 using speech bearer service 6-2 DSS1 (Digital Subscriber Signaling #1) incoming calls 7-7 outgoing calls 7-1 placing calls 7-11 DTE interface, operation mo
Reference Guide for the Model XM128 ISDN Digital Modem O S out of band signaling G-2 P security level 1 B-2 level 2 B-2 level 3 B-3 types and levels B-1 package contents 2-1 serial port 1-7 packet length, determining 6-5 serial port interface F-1 passwords, setting and modifying B-3 simplex mode C-1 Phone 1 port 1-7 SLIP 5-1 Phone 2 port 1-7 Speech bearer 5-3 point-to-point configuration 7-11 SPID numbers 4-6, G-4 port ISDN 1-7 Phone 1 1-7 Phone 2 1-7 serial 1-7 Power LED 1-4 S-register d
Reference Guide for the Model XM128 ISDN Digital Modem V W V.110 call answering 6-10 making a call 6-10 World Wide Web iv V.120 answering incoming calls 6-12, 6-13 bundled call 6-13 configuring 6-12 dialing out 6-13 error correction and data compression with 6-15 making a bundled call with 6-13 selecting for European ISDN 6-11 X X.75 Answering a call 6-16 bundled call 6-17 ISDN communications for Europe 6-16 making a call 6-17 prestored phone numbers 6-18 V.