COMSPHERE 3825PLUS MODEM USER’S GUIDE Document No.
Quick Installation for the COMSPHERE 3825Plus Modem A. Get your modem ready: Your modem needs a serial cable to connect it to your computer. One end must have a 25-pin plug, and the other end must have a socket that matches the modem port on your computer. This is a 25-pin or a 9-pin connector. Plug the serial cable into the serial port of your PC. Plug the serial cable into your modem. Plug the transformer at the other end of the power cord into a 110 Vac power outlet. Turn on your modem and your PC.
COMSPHERE 3825Plus Modem COMSPHERE 3825Plus Modem User’s Guide 3825-A2-GB30-20 3rd Edition (November 1996) Changes and enhancements to the product and to the information herein will be documented and issued as a new release or a limited revision of this manual. The 3825Plus modem connects to the Public Switched Telephone Network (PSTN) using the Universal Service Order Code (USOC) for Permissive mode, RJ11C. An RJ14C jack must be used to connect a two-line telephone to the modem.
Safety Instructions Important Safety Instructions 1. Read and follow all warning notices and instructions marked on the product or included in the manual. 2. Slots and openings in the cabinet are provided for ventilation. To ensure reliable operation of the product and to protect it from overheating, these slots and openings must not be blocked or covered. 3. Do not allow anything to rest on the power cord and do not locate the product where persons will walk on the power cord. 4.
COMSPHERE 3825Plus Modem Notices
Safety Instructions Government Requirements and Equipment Return Certain governments require that instructions pertaining to modem connection to the public switched telephone network be included in the installation and operation manual. Specific instructions are listed in the following sections. United States Notice To Users Of The Public Switched Telephone Network 1. This equipment complies with Part 68 of the FCC rules.
COMSPHERE 3825Plus Modem Canada Notice To The Users Of The Canadian Public Switched Telephone Network The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. The Department does not guarantee the equipment will operate to the user’s satisfaction.
Safety Instructions United Kingdom Ringer Equivalence Number The Ringer Equivalence Number (REN) is a customer guide indicating approximately the maximum number of items of apparatus that should be connected simultaneously to the telephone line. The sum of the RENs should not exceed four. This value includes any BT-provided instrument which may be assumed to have a REN of 1 unless marked otherwise. The REN of this modem is 1.
COMSPHERE 3825Plus Modem Japan Notices This equipment is in the 2nd Class category (information equipment to be used in a residential area or an adjacent area thereto) and conforms to the standards set by the Voluntary Control Council for Interference by Information Technology Equipment aimed at preventing radio interference in such residential area. When used near a radio or TV receiver, it may become the cause of radio interference. Read the instructions for correct handling.
Table of Contents Preface Objectives and Reader Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . How to Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v v v 1. Introduction Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3825Plus Modem 4. AT Commands and S-Registers Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Command Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AT Command List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-Register List . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents E. CCITT V.25bis Dialing Commands and Responses Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call Request Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call Answer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Program Normal (PRN) . . . . . . . . . . . . . . . . . . . . . .
Preface Objectives and Reader Assumptions Appendix B provides instructions for performing diagnostic tests when data communications problems occur, and explains the Automatic Firmware Download process. This manual describes how to install and operate the 3825Plus modem. It is intended for all users of the 3825Plus modem. Appendix C lists the technical specifications of the 3825Plus modem. Appendix D provides EIA-232-E and JM8 to RJ11 crossover cable pin assignments.
Introduction Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3825Plus Modem Front Panel and Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Status Indicators (LEDs) . . . . . . . . . . . . . . .
COMSPHERE 3825Plus Modem • High-speed transmission using asynchronous, synchronous, or UNIX devices over full- or half-duplex dial networks or 2-wire leased lines. 3825Plus Modem Front Panel and Status Indicators • Support as a remote (tributary) device by the COMSPHERE 6700 or 6800 Series Network Management System. The front panel of the 3825Plus modem is equipped with 8 LEDs (status indicators) that monitor modem activity (Figure 1-1).
Introduction Table 1-1 3825Plus LEDs Label EC/SQ Color green Indicates Error Control/Signal Quality ON: The modem is in Error Control mode. Off: The modem is not in Error Control mode. Flashing; Predominantly ON: The modem is in Error Control mode and is receiving errors due to poor VF line signal quality. Flashing; Predominantly Off: The modem is not in Error Control mode and is receiving errors due to poor VF line signal quality.
3825Plus Modem Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3825Plus Modem Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Customer-Supplied Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3825Plus Installation . . . . . . . . . . . . .
COMSPHERE 3825Plus Modem 3825Plus Installation The rear panel of the 3825Plus modem (Figure 2-1) has the following switches and connectors: Before installing your standalone modem, make sure your installation site is clean and well-ventilated. Allow space around the modem for installing cables and telephone cords, and make sure the modem is located within reach of the ac power outlet.
3825Plus Modem Installation DTE Connection Telephone Connection Use the following procedure to connect the RS-232-E cable from the modem to the DTE: Use the following procedure to connect the modem to a single-line or two-line telephone: " Procedure " Procedure 1. Make sure the modem’s rear panel power switch is Off. 1. Insert the 6-position, 4-conductor modular plug into the jack labeled PHONE. 2.
COMSPHERE 3825Plus Modem Modem Power-Up NOTE If you have already changed certain configuration options, you may have lost AT command control. For example, operating in Synchronous mode or disabling AT commands results in an inability to change configuration options. To regain AT command control, refer to the Recovering AT Commands section for these procedures.
3825Plus Modem Installation If these settings are not appropriate, then change them to a setting compatible with your current application. NOTE When configuring your modem, keep a record of its configuration options as a future reference in case the modem must be replaced. The procedures for an AT recovery using an asynchronous terminal or personal computer are listed in the following section.
COMSPHERE 3825Plus Modem Synchronous Leased-Line Applications 3. To save changes, use the &W command: TYPE: AT&Wn Where: n is one of the following storage areas: PRESS: For synchronous leased-line operation, create the following initialization string with the following commands: 0 for Active (Saved) 1 for Customer 1 2 for Customer 2 TYPE: AT&F &D1 &S1 S44=n S45=n S82=n &M1 &W &Ln &W Enter Where: n is the value for the AT command.
Fax Operation 3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Fax Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 • You must have configured your modem according to the specifications of your fax software manual.
AT Commands and S-Registers Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Switching Between Data Mode and Online Command Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Escape Sequence and Escape Guard Time . . . . . . . . . . . . .
COMSPHERE 3825Plus Modem • Commands with the suffix n have several options associated with them. For example, in the Ln command, L1 sets the speaker volume to Low and L3 sets the speaker volume to High. Omitting the suffix has the same effect as using a zero suffix; for example, ATX is equivalent to ATX0. To enter online Command mode while in Data mode, enter the following sequence: TYPE: +++ Use the O command to return to Data mode from online Command mode.
AT Commands and S-Registers Table 4-1 (1 of 14) 3825Plus AT Commands *** AT Command Recovery Mode Allows the modem to remain in Asynchronous data mode so that AT commands can be used to change the modem’s current configuration. Use this command when AT commands are disabled or the modem is operating in Synchronous data mode. This command can only be executed after the completion of a power-up self-test.
COMSPHERE 3825Plus Modem Table 4-1 (2 of 14) 3825Plus AT Commands Dn Dial Begins the dialing sequence. The dial string n (modifiers and telephone number) is entered after the D command. Any digit 0–9, * , # , A, B, C, D, may be dialed as a DTMF tone. Only the digits 0–9 can be dialed in Pulse Dial mode. The following example shows how to dial through a PBX.
AT Commands and S-Registers Table 4-1 (3 of 14) 3825Plus AT Commands Hn Hook Switch Control Allows the modem to go off-hook or on-hook. H, H0 H1 Modem goes on-hook. Modem goes off-hook. In Identification Provides useful information when upgrading or servicing the product. I, I0 I1 I2 I3 I4 I5 I6 I9 Displays product code (default is 144). Displays 3-digit firmware revision number. Performs an EPROM check. Displays serial number. Displays model number. Displays hardware part number.
COMSPHERE 3825Plus Modem Table 4-1 (4 of 14) 3825Plus AT Commands Qn Result Codes Result codes are informational messages (such as Connect and Ring) sent from the modem and displayed on the asynchronous DTE terminal. Refer to Table A-1 for a list of result codes. Q, Q0 Enables modem to send result codes to the DTE. Q1 Disables modem from sending result codes to the DTE. Q2 Enables in Originate mode only for modem to send result codes to the DTE. Required for most UNIX applications.
AT Commands and S-Registers Table 4-1 (5 of 14) 3825Plus AT Commands Xn, continued Add/EC. If error control is negotiated, attaches the /EC suffix to the CONNECT rate message. Add/V42,MNP. Attaches the V42b, V42, MNP5, MNP4, MNP3, MNP2, or NoEC suffix to the CONNECT rate message. Use DTE Rate. Displays DTE data rate instead of line CONNECT rate message. DIAL TONE DETECT Sets the modem for dial tone detection (enable) or blind dialing (disable). Disable. Sets the modem for blind dialing.
COMSPHERE 3825Plus Modem Table 4-1 (6 of 14) 3825Plus AT Commands &&P1 Clone Remote Copies the firmware from the modem that receives the command to another 3825Plus modem. The modem must be in Online Command mode. (Online Command mode is established with the +++ escape sequence.
AT Commands and S-Registers Table 4-1 (7 of 14) 3825Plus AT Commands &Fn Select Factory Default Configuration Options Loads factory configuration options into the Active (Operating) area. The &F5 and &F6 options invoke the Enhanced Throughput Cellular (ETC) feature. &F0 &F3 &F5 &F6 Async Dial UNIX Dial Cellular (Mobile) Cellular (PSTN) If your modem is attached to a cellular telephone, use the &F5 command to configure the modem for cellular communications.
COMSPHERE 3825Plus Modem Table 4-1 (8 of 14) 3825Plus AT Commands &In Dial Transmit Level for Cellular Auto When Dial Transmit Level Type is set to Permissive, &In sets Dial Transmit Level to a value between –10 and –32 dBm. &I99 and &I100 causes the level to be varied automatically according to conditions for Enhanced Throughput Cellular (ETC) operation. &J0 overrides this command, and is the default for North America and Singapore. See Appendix F.
AT Commands and S-Registers Table 4-1 (9 of 14) 3825Plus AT Commands &Mn or &Qn Async/Sync Mode and DTE Dialer Type Sets the modem for either asynchronous or synchronous operation and selects the type of dialing method the modem uses. &M, &M0, &Q, &Q0 Modem operates in Asynchronous mode and uses AT Command protocol. &M1, &M3, &Q1, &Q3 Modem operates in Synchronous mode and uses AT Command protocol.
COMSPHERE 3825Plus Modem Table 4-1 (10 of 14) 3825Plus AT Commands &Sn DSR Control Data Set Ready (DSR) is a signal from the modem to the DTE indicating the modem is connected and ready for operation. &S, &S0 Forced On. Forces DSR output ON constantly. This is usually used for leased-line applications and when the DTE requires DSR to always be ON. &S1 Standard RS232. Modem controls DSR to the DTE. The modem raises DSR when it begins the handshake process. DSR lowers upon disconnect.
AT Commands and S-Registers Table 4-1 (11 of 14) 3825Plus AT Commands &Xn Transmit Clock Source Determines the source of timing for synchronous data transmitted from the DTE. &X, &X0 Internal. Modem provides transmit clock source for synchronous data (Pin 15). &X1 External. Modem derives external transmit clock source provided on Pin 24 for synchronous data. &X2 Receive Clock Loop. Modem derives transmit clock source from receive signal for synchronous data (Pin 17).
COMSPHERE 3825Plus Modem Table 4-1 (12 of 14) 3825Plus AT Commands %Cn MNP5 Data Compression Determines if the modem uses MNP Class 5 data compression. It can be set independently of V.42bis data compression. Online changes do not take effect until a disconnect occurs. %C, %C0 Disable. Enable. %C1 %SA, %SB, %SD, %SP, %SR, %SV (see Security at the end of this chapter) +FCLASS=n Service Class Selection Normally set by fax software, Service Class Selection determines the fax protocol.
AT Commands and S-Registers Table 4-1 (13 of 14) 3825Plus AT Commands \Kn Buffer Control, Send Break Control, Break Forces Escape The \Kn command sets three configuration options simultaneously: \K0 \K1 \K2 \K3 \K4 \K5 \K6 Break Buffer Control Discard Data Discard Data Keep Data Keep Data Keep Data Keep Data Discard Break Send Break Control Break First Break First Break First Break First Data First Data First Not Applicable Break Forces Escape Enable Disable Enable Disable Enable Disable Disable BRE
COMSPHERE 3825Plus Modem Table 4-1 (14 of 14) 3825Plus AT Commands \Tn No Data Disconnect Timer Forces the modem to disconnect if no data is transmitted or received within a specified amount of time. \T, \T0 \Tn Disable. \T2 is the default for Denmark, and \T3 is the default for France and Germany. See Appendix F. Where n is a value from 1 to 255 in 1-minute increments.
AT Commands and S-Registers S-Register List S-registers affect the operating parameters of the 3825Plus modem. These registers are applicable only when the DTE Dialer Type configuration option is set for AT. (See &Mn and &Qn commands.) Table 4-2 lists S-registers supported by the 3825Plus. Not all S-register values are valid in all countries. See Appendix F. S-registers can be displayed and/or modified when the modem is in Command mode.
COMSPHERE 3825Plus Modem Table 4-2 (2 of 10) 3825Plus S-Registers S4 Line Feed Character Determines ASCII value used as the line feed character. Enter a value from 0–127 for the line feed character. The factory setting is 10 (ASCII line feed). S5 Backspace Character Determines ASCII value used as the backspace (Backspace key). This character moves the cursor to the left and erases the previous character. Enter a value from 0–127. The factory setting is 08 (ASCII backspace).
AT Commands and S-Registers Table 4-2 (3 of 10) 3825Plus S-Registers S18 Test Timeout Sets the duration (in seconds) for the modem tests. This automatically cancels any test in progress after the time of this register expires. Any test can be manually canceled by issuing the escape sequence (+++) followed by the &T0 command. Enter a value from 0–255 seconds. (A value of 0 disables this register.) The factory setting is Disable (0).
COMSPHERE 3825Plus Modem Table 4-2 (4 of 10) 3825Plus S-Registers S41 Dial-Line Rate Determines the modem’s highest data rate and modulation scheme for operation on dial lines. S41 can also be set using the %B and %BL commands. Register has the following values (shown in bps): 1 = 14,400 (V.32bis) 2 = 12,000 (V.32bis) 3 = 9600 (V.32bis/V32) 4 = 7200 (V.32bis) 5 = 4800 (V.32bis/V.32) 6 = 2400 (V.22bis) 7 = 1200 (V.
AT Commands and S-Registers Table 4-2 (5 of 10) 3825Plus S-Registers S44 Leased-Line Rate Determines the modem’s highest data rate and modulation scheme for operation on 2-wire leased lines in either Answer or Originate mode. Register has the following values (shown in bps): 1 = 14,400 (V.32bis) 2 = 12,000 (V.32bis) 3 = 9600 (V.32bis) 4 = 7200 (V.32bis) 5 = 4800 (V.32bis) 6 = 2400 (V.22bis) 18 = 19,200 (V.32terbo) 19 = 16,800 (V.32terbo) 25 = 33,600 (V.34 proprietary extension) 26 = 31,200 (V.
COMSPHERE 3825Plus Modem Table 4-2 (6 of 10) 3825Plus S-Registers S49 Transmit Buffer Disconnect Delay Determines the maximum amount of time the modem can continue to send data in its Transmit Buffer to the remote modem after it is commanded by the DTE to disconnect. Register has the following values: 0 = Disable (Immediate disconnect) 1 = 1 second 2 = 2 seconds D D D D 255 = 255 seconds Factory default is 10 seconds.
AT Commands and S-Registers Table 4-2 (7 of 10) 3825Plus S-Registers S63 V.25bis Idle Character Identifies to the modem the type of idle fill used by the DTE while in V.25bis mode. Register has the following values: 0 = Mark 1 = Flag The factory setting is Mark. S64 V.25bis New Line Character Identifies to the modem the type of line terminator used by the DTE while in V.25bis mode.
COMSPHERE 3825Plus Modem Table 4-2 (8 of 10) 3825Plus S-Registers S74 Network Position Identification Register identifies each modem as either a control or tributary modem. Register has the following values: 0 = Tributary 1 = Control The factory setting is Tributary. S75 Network Management Address Register determines the modem’s network address. This address is used when accessing the modem from the NMS. Enter a value from 0 (network address 001) to 255 (network address 256).
AT Commands and S-Registers Table 4-2 (9 of 10) 3825Plus S-Registers S80 No Data Disconnect Trigger Signal Register determines whether Pin 2 (transmit data) or Pin 3 (receive data) of the modem’s RS-232 serial interface is monitored so that the modem can disconnect the call if there is no activity for a certain period. (See the \T command.) Register has the following values: 0 = Transmit or Receive 1 = Transmit only 2 = Receive only 3 = Transmit and Receive The factory setting is 3.
COMSPHERE 3825Plus Modem Table 4-2 (10 of 10) 3825Plus S-Registers S89 V.42 ARQ Window Size Increase Register allows the V.42 Automatic Request for Transmission (ARQ) window size to be set to a value from 6 to 15 frames to accommodate satellite delays. Register has the following values: 0 = Automatic Adjust (6 –15 frames) 1 = 7 frames 2 = 8 frames 3 = 9 frames D D D D 9 = 15 frames This command applies only to connections made using V.42bis data compression or V.42 error control.
AT Commands and S-Registers Security Originate Security Security configuration on the 3825Plus modem is performed using the AT commands and S-registers in Table 4-3. An Originate Access password is entered by a local user to gain access to a local 3825Plus modem. This password must be embedded in the AT dial command. The password must be defined as a DTE_Entry type in the password table.
COMSPHERE 3825Plus Modem Callback Security VF Only Callback Security causes the responding modem to disconnect and call back to the phone number provided by the user at the originating modem. The user enters the number, when prompted by the remote modem, as a Directory location 1–10 preceded by the # sign, or as a complete telephone number (including the pause and wait dial modifiers). For example: Use commands like the following to configure the modem for VF Only Security.
AT Commands and S-Registers User A dials this modem by following the phone number with a wait dial modifier and the VF password 12345678, and is not prompted for a DTE password. User B dials this modem by following the phone number with a wait dial modifier and the VF password 87654321, and is prompted for a DTE password. User B responds by typing xyz789.
COMSPHERE 3825Plus Modem Table 4-3 (2 of 3) 3825Plus Security Commands S67 Callback Security Determines whether Callback Security is used. 0 = Disable 1 = Enable (not valid if S68=0) The factory setting is Disable. S68 Answer Security Determines whether and which type of Answer Security is used. 0 = No Answer Security 1 = DTE Only 2 = VF and DTE 3 = VF with DTE The factory setting is No Answer Security. S70 Originate Security Determines whether Originate Security is used.
AT Commands and S-Registers Table 4-3 (3 of 3) 3825Plus Security Commands S97 DTE Password Termination Character Determines ASCII value used to indicate the end of a password or Callback Directory/Number entered by the remote user. Enter a value from 0–127 for the command end character. The factory setting is 13 (ASCII carriage return). S98 DTE Password Backspace Character Determines ASCII value used as the backspace (Backspace key) when entering a password or Callback Directory/Number.
Remote Access 5 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Remote Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3825Plus Modem The Top-Level menu of the remote 3825Plus modem is similar to the local COMSPHERE modem with the following exceptions: NOTE If a connection is not established between a local COMSPHERE modem and a remote 3825Plus modem, the LCD displays Remote Mode Fail – No Circuit. Press any key to return to the Top Level menu, and dial again. • Change Directory is the only function available under the Call Setup branch.
Result Codes A Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 Overview Table A-1 lists all the result codes 3825Plus modems may send to the DTE. Result codes can be numeric or verbal, terse or extended. See the Qn, Vn, and Xn commands in Chapter 4 for more information.
COMSPHERE 3825Plus Modem Table A-1 (1 of 3) Result Codes Numbers (1) Numbers (2) Word Description 0 0 OK Command executed 1 1 CONNECT Modem connected to line 2 2 RING Modem receiving a ring voltage from the VF line 3 3 NO CARRIER Modem lost or does not detect carrier signal, or does not detect answer tone 4 4 ERROR Invalid command 5 5 CONNECT 1200* Connection at 1200 bps 6 6 NO DIALTONE* No dial tone detected 7 7 BUSY* Busy or trunk busy signal detected 8 8 NO ANSWER*
Result Codes Table A-1 (2 of 3) Result Codes Numbers (1) Numbers (2) Word Description 17 17 CONNECT 16800* Connection at 16,800 bps 19 1 CONNECT 300* Connection at 300 bps 20 10 CONNECT 2400/ EC*** Connection at 2400 bps with error control 21 11 CONNECT 4800/ EC*** Connection at 4800 bps with error control 22 12 CONNECT 9600/ EC*** Connection at 9600 bps with error control 23 16 CONNECT 12000/ EC*** Connection at 12,000 bps with error control 24 13 CONNECT 14400/ EC*** Connec
COMSPHERE 3825Plus Modem Table A-1 (3 of 3) Result Codes Numbers (1) Numbers (2) Word Description 43 43 CONNECT 21600/ EC*** Connection at 21,600 bps with error control 44 44 CONNECT 24000/ EC*** Connection at 24,000 bps with error control 45 45 CONNECT 26400/ EC*** Connection at 26,400 bps with error control 46 46 CONNECT 28800/ EC*** Connection at 28,800 bps with error control 47 47 CONNECT 31200/ EC*** Connection at 31,200 bps with error control 48 48 CONNECT 33600/ EC*** Conn
Troubleshooting B Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 Automatic Firmware Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5 Download Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3825Plus Modem Table B-2 Online Operation Action Symptom Data scrambled or unreadable Verify that the character format (data bits, parity, and stop bits) is set to the same value in both modems. Missing data during a transfer Verify that you are using the same method of flow control for both the modem and the DTE. If using XON/XOFF flow control, verify that the modem’s parity matches the DTE’s parity.
Troubleshooting Table B-4 (2 of 3) Modem – VF Connection Symptom Modem goes off-hook, answers, but does not connect (continued) Action Verify that originating modem supports your modem’s modulation schemes. The 3825Plus modem recognizes V.34, V.32terbo, V.32bis, V.32, V.22bis, V.22, V.21, Bell 212A, and Bell 103J. It does not support other vendors’ proprietary modulation schemes. Use the S41 register to force your modem to operate at the same modulation scheme as the originating modem.
COMSPHERE 3825Plus Modem Table B-4 (3 of 3) Modem – VF Connection Symptom Modem establishes and disconnects a call Action You may have a poor VF connection. Disconnect and dial again. The remote modem may have encountered an EC Disconnect, where the modem is configured to establish a call using error correction. If the modems cannot negotiate EC, then a disconnect occurs. The remote modem may be in a forced Error Control mode (disconnect if there is no error control). Reconfigure your modem to V.
Troubleshooting Table B-6 Fax Operation Symptom Modem cannot send or receive a fax Action Make sure that your fax software is correctly installed. Check your fax software to see if there is an Answer mode or Receive Fax setting that must be enabled. Sections of your fax are missing This often indicates a noisy telephone line or a flow control problem. To resolve the flow control problem, try using hardware flow control (RTS/CTS).
Technical Specifications C Table C-1 (1 of 2) Model 3825Plus Technical Specifications Description Specifications APPROVALS Refer to the label on your modem or contact your local sales representative. COMPATIBILITY AND VF DATA RATES Dial-Line Modulations Proprietary V.34 (33,600, 31,200 bps) ITU-T V.34 (28,800, 26,400, 24,000, 21,600, 19,200, 16,800,14,400,12,000, 9600, 7200, 4800, 2400 bps) V.32terbo (19,200, 16,800 bps) CCITT V.32bis (14,400, 12,000, 9600, 7200, 4800 bps) CCITT V.
COMSPHERE 3825Plus
Pin Assignments D EIA-232-E Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1 JM8 to RJ11 Crossover Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2 EIA-232-E Pin Assignments Table D-1 lists the EIA-232-E pin assignments for the modem.
COMSPHERE 3825Plus Modem JM8 to RJ11 Crossover Cable For 2-wire leased-line connections to a JM8 network interface, an 8-position to 6-position crossover cable (see Figure D-1) must be used according to the following FCC requirements: ‘‘The RJ series of jacks should not be used for connecting data equipment to nonswitched private line networks – specifically, the service equivalents of the pre-divestiture Series 3002 (Category II, Tariff #260) service.
CCITT V.25bis Dialing Commands and Responses Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call Request Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call Request with Number Provided (CRN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3825Plus Modem Call Request Commands Call Response Call Request commands are issued from the DTE to the modem and are responsible for initiating any dial calls. Call Request commands include Call Request with Number Provided (CRN), Call Request with Stored Memory Address Provided (CRS). A Call Response indicates if the command was accepted by the modem. Call Response includes Call Failure Indication (CFI) and Call Connecting (CNX).
CCITT V.25bis Dialing Commands and Responses Call Connecting (CNX) Program Normal (PRN) The CNX response informs the DTE that the modem has connected to the remote modem. CNX is similar to the AT result code CONNECT. The Program Normal (PRN) command allows the DTE to enter and store a telephone number to a specific directory location. PRN is similar to the AT&Z command. The CNX response format is CNX.
COMSPHERE 3825Plus Modem Command Response The INV response format is: INVxx A Command Response indicates that the command entered was a valid or invalid entry. Command Response includes Valid (VAL) and Invalid (INV). Where: CU MS PS PV Valid (VAL) The VAL response indicates that the modem has accepted the V.25bis command issued by the DTE. VAL is similar to the AT result code OK. xx is command unknown message syntax error parameter syntax error parameter value error Table E-1 lists V.
CCITT V.25bis Dialing Commands and Responses Table E-2 lists V.25bis response messages supported by the 3825Plus modem. Table E-2 V.25bis Response Messages V.
Country-Specific Configuration Options F Configuration Options by Country . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1 Configuration Options by Country Reference to particular country codes in this guide is not an assurance that the modem has been approved for use in that country. Consult your sales representative. Table F-1 shows configuration options whose validity or default values vary according to country code.
COMSPHERE 3825Plus Modem ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ Germany Japan Netherlands North America V V V V V V V V F-2 November 1996 3825-A2-GB30-20 United Kingdom France S0=0
Country-Specific Configuration Options ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁ
COMSPHERE 3825Plus Modem ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁ ÁÁ ÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ
Country-Specific Configuration Options ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁ
Glossary Active (Operating) A configuration area containing configuration options currently in use by the modem. When a power cycle occurs, a reset is performed, or a save is issued, this area is updated with the contents of Active (Saved). Active (Saved) A nonvolatile configuration area containing the most recently saved configuration options. Any changes made to configuration options can be saved by issuing an AT&W0 command. analog loop See local analog loop.
COMSPHERE 3825Plus Modem automode To change modulations or rates within a modulation when modems first connect. A modem may automode to a different modulation than what it is configured for due to the limitations of the remote modem, or automode to a lower rate due to unfavorable VF line conditions during connection. autorate To adjust to varying VF line conditions by changing the data rate to a higher or lower rate after connection.
Glossary Customer 1 A user-defined configuration area containing customized configuration options for a specific application. Customer 2 A user-defined configuration area containing customized configuration options for a specific application. data bank An area within the modem used to store the modem’s firmware. data carrier A continuous frequency signal that can be modulated by another signal that contains information to be transmitted.
COMSPHERE 3825Plus Modem DTMF Dual Tone Multi-Frequency. DTMF tones are the sounds produced by pressing the keys of a Touch Tone phone, or by dialing a number with a modem using the ATDTn command. EIA Electronic Industries Association. This organization provides standards for the data communications industry. EIA-232-E An Electronic Industries Association’s standard defining the 25-position interface between data terminal equipment and data communications equipment.
Glossary leased line A private line connection exclusively for the user. No dialing is necessary. LED Light-Emitting Diode. A light or status indicator on the DCP that glows in response to the presence of a certain condition (e.g., Alrm). local analog loopback The modem’s transmit VF signal is looped to its receiver.
COMSPHERE 3825Plus Modem register A part of the modem’s memory that contains values that determine the modem’s operating characteristics. remote loopback A test that sends a signal to the remote modem to test the local modem, the remote modem, and the circuit between them. result code An asynchronous message (in either numbers or words) that the modem sends to the DTE after executing or trying to execute a command.
Glossary V.32bis A standard for modems operating full-duplex with asynchronous or synchronous data over dial networks (PSTN) or leased lines at 14,400, 12,000, 9600, 7200, or 4800 bps. V.32terbo A proprietary standard for modems operating full-duplex with asynchronous or synchronous data over dial networks (PSTN) or leased lines at 19,200 or 16,800 bps. The terbo is a pun on turbo and ter; the next iteration of the V.32 recommendation, had one been finalized, would have been V.32ter. V.
Index Symbols ! (hook flash), 4-4 “,” dial modifier (Pause), 4-4 “,” Pause Time (S8), 4-18 “;” (return to command mode), 4-4 @ (quiet answer), 4-4 Numbers 3825Plus modem AT commands, 4-2 description, 1-1 features, 1-1 operating modes, 4-1 S-registers, 4-17 A A/ (Repeat Last Command), 4-3 ac power, 2-3 Administration Password %SA command (Enter), 4-29 %SA= command (Change), 4-29 described, 4-27 Answer mode (ATA), 4-3 Answer Security (S68), 4-30 Asymmetric Rate Mode, 4-18 Async/Sync Mode (AT&M), 4-11 AT Co
COMSPHERE 3825Plus Modem X (Extended Result Code, Dial Tone Detect, Busy Tone Detect), 4-6 Y (Long Space Disconnect), 4-7 Z (Reset and Load Active), 4-7 AT&T exclusive dialing, 2-6 auto-answer problems, B-2 Automatic Firmware Download Center, B-5 automode (S78), 4-24 autorate S76 Dial Line, 4-24 S82 Leased Line, 4-25 B Bell modulations, 4-3 Blind Dial Pause (S6), 4-18 blind dialing, 4-7 Break Buffer Control (AT\K), 4-15 Break Forces Escape (AT\K), 4-15 busy tone detect (ATX), 4-6 configuration options fa
Index E I echo command, 4-4 EIA-232-E cable, 2-1 EIA-232-E pin assignments, D-1 Enhanced Throughput Cellular (ETC), 4-9, 4-10 Entry Wait Time (S94), 4-30 equipment provided by customer, 2-1 equipment supplied, 2-1 error codes (result codes), A-1 Error Control Fallback Character (AT%A), 4-13 Error Control Mode (AT\N), 4-15 Error Control Negotiate Buffer (AT\C), 4-14 Escape Guard Time, 4-1, 4-18 escape sequence (+++), 4-1, 4-17 ETC (Enhanced Throughput Cellular), 4-10, 4-26 extended result codes (ATX), 4-6
COMSPHERE 3825Plus Modem S4 (Line Feed Character), 4-18 S5 (Backspace Character), 4-18 S6 (Blind Dial Pause), 4-18 S7 (No Answer Timeout), 4-18 S8 (“,” Pause Time), 4-18 S10 (No Carrier Disconnect), 4-18 S12 (Escape Guard Time), 4-1, 4-18 S14 (Asymmetric Rate Mode), 4-18 S18 (Test Timeout), 4-19 S26 (RTS-to-CTS Delay), 4-19 S39 (Receive Buffer Disconnect Delay), 4-19 S41 (Dial Line Rate), 4-20 S43 (V32bis Train), 4-20 S44 (Leased Line Rate), 4-21 S45 (Leased Line Transmit Level), 4-21 S48 (Leased Line Carr
Index self-test AT&T9, 4-12 failure, B-1 power-up, 2-4 Send Break Control (AT\K), 4-15 serial number, 4-5 speaker on/off, 4-5 speaker volume, 4-5 status indicators, 1-2 stop test (AT&T0), 4-12 Straps When Disconnected (S88), 4-25 synchronous leased-line applications, 2-6 V V.21 or V.22 modulation, 4-3 V.25bis applications, 2-6 V.25bis Coding (S62), 4-22 V.25bis dialing, 4-11 V.25bis dialing commands, E-1 V.25bis Idle Character (S63), 4-23 V.25bis New Line Character, 4-23 V.29 Train On Data (S92), 4-26 V.
