T1 ESF CSU ACE User Manual Part Number 1203025L1 61203025L1-1C May 2001
Trademark Information: T-WATCH is a trademark of ADTRAN. OpenView is a registered trademark of Hewlett Packard Company. SunNet Manager is a trademark of Sun Micro Systems, Inc. 901 Explorer Boulevard P.O. Box 140000 Huntsville, AL 35814-4000 (256) 963-8000 © 2001 ADTRAN, Inc. All Rights Reserved. Printed in U.S.A.
The following conventions are used in this manual. Notes provide additional useful information. Cautions signify information that could prevent service interruption. Warnings provide information that could prevent damage to the equipment or endangerment to human life. Important Safety Instructions When using your telephone equipment, please follow these basic safety precautions to reduce the risk of fire, electrical shock, or personal injury: 1. 2. 3. 4.
Affidavit Requirements for Connection to Digital Services • An affidavit is required to be given to the telephone company whenever digital terminal equipment without encoded analog content and billing protection is used to transmit digital signals containing encoded analog content which are intended for eventual conversion into voice band analog signal and transmitted on the network.
Affidavit for Connection of Customer Premises Equipment to 1.
( ) D. In lieu of the proceeding training requirements, the operator(s)/maintainer(S) is (are) under the control of a supervisor trained in accordance with _______________ (circle one) above. I agree to provide ____________________ (telco’s name) with proper documentation to demonstrate compliance with the information in the preceding paragraph, if so requested.
FCC regulations require that the following information be provided in this manual: 1. This equipment complies with Part 68 of the FCC rules. On the bottom of the equipment housing is a label that shows the FCC registration number and Ringer Equivalence Number (REN) for this equipment, if applicable. If required, this information must be given to the telephone company. 2. The following information may be required when applying to the local telephone company for leased line facilities. Service Type 3. 4.
Federal Communications Commission Radio Frequency Interference Statement This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Canadian Equipment Limitations Notice: The Canadian Industry and Science Canada 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. Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company.
Limited Product Warranty ADTRAN warrants that for five (5) years from the date of shipment to Customer, all products manufactured by ADTRAN will be free from defects in materials and workmanship. ADTRAN also warrants that products will conform to the applicable specifications and drawings for such products, as contained in the Product Manual or in ADTRAN's internal specifications and drawings for such products (which may or may not be reflected in the Product Manual).
Customer Service, Product Support Information, and Training ADTRAN will replace or repair this product within five years from the date of shipment if the product does not meet its published specification, or if it fails while in service. A return material authorization (RMA) is required prior to returning equipment to ADTRAN. For service, RMA requests, training, or more information, see the toll-free contact numbers given below.
Identify the RMA number clearly on the package (below address), and return to the following address: ADTRAN Customer and Product Service 901 Explorer Blvd. Huntsville, Alabama 35806 RMA # _____________ Training The Enterprise Network (EN) Technical Training Department offers training on our most popular products. These courses include overviews on product features and functions while covering applications of ADTRAN's product lines.
Table of Contents List of Figures .................................................................................................................. xvii List of Tables ......................................................................................................................xix Chapter 1. Introduction T1/FT1 Overview ................................................................................................................ 1-1 T1 Service Offerings............................................
Table of Contents Chapter 2. Installation Unpack and Inspect ............................................................................................................. 2-1 Shipped by ADTRAN................................................................................................... 2-1 Provided by Customer ................................................................................................. 2-1 Power Connection ...........................................................................
Table of Contents SET PASSCODE ........................................................................................... 3-10 FACT RESTORE ........................................................................................... 3-10 REMOTE T-WATCH ................................................................................... 3-10 TEST ...................................................................................................................... 3-10 LOCAL LOOPBACK .........................
Table of Contents xvi T1 ESF CSU ACE User Manual 61203025L1-1
List of Figures Figure 1-1. T1 ESF CSU ACE Application ...................................................................... 1-2 Figure 1-2. T1 ESF CSU ACE Front View ........................................................................ 1-4 Figure 1-3. Jack Signal Directions..................................................................................... 1-5 Figure 1-4. Network Loopback Tests ............................................................................... 1-9 Figure 1-5.
List of Figures Figure 3-18. Time/Data Screen ......................................................................................... 3-22 Figure 3-19. Re-initialize Unit/Address Screen ............................................................. 3-23 Figure 3-20. Test Menu Tree............................................................................................... 3-24 Figure 3-21. Local Loopback Test Screen.........................................................................
List of Tables Table A-1. RJ-48C Connector Pin Assignments............................................................ A-2 Table A-2. EIA-232 Connector Pin Assignments .........................................................
List of Tables xx T1 ESF CSU ACE User Manual 61203025L1-1
Chapter 1 Introduction T1/FT1 OVERVIEW T1 digital communication links have been used by telcos for the transmission of voice since the early sixties. The D4 channel bank is an example of a T1 digital carrier system that was introduced in the mid-seventies and is still widely used by the telcos. Communication demands of business continued to grow to the point that the telcos began offering T1 service directly to the public. D4 channel banks were used for T1 in corporate network topographies for voice.
Chapter 1. Introduction offering. Since the introduction of ESF, equipment installed in private networks can also provide this performance information to the user. T1 ESF CSU ACE OVERVIEW Most carriers (regional or local telcos), when supplying a T1 line to customer premises equipment (CPE), require an interface to monitor the T1 line.
Chapter 1. Introduction The T1 ESF CSU ACE provides surge protection, signal regeneration, alarms, and loopbacks necessary for circuit operation and fault isolation. The unit provides the simultaneous use of performance report messages of ANSI T1.403 and maintenance messages of AT&T TR54016. The T1 ESF CSU ACE also provides conversion from SF to ESF framing formats, allowing older SF data terminal equipment (DTE) to take advantage of superior diagnostic capabilities of ESF T1 facilities.
Chapter 1. Introduction Figure 1-2 shows the T1 ESF CSU ACE, and Figure 1-3 shows the jack signal directions. Figure 1-2.
Chapter 1. Introduction Figure 1-3. Jack Signal Directions Features The following features give the T1 ESF CSU ACE many advantages over other products of its kind: 61203025L1-1 • Smallest T1 ESF CSU ACE in the industry. • Front panel interface eliminates the need for a terminal to configure the T1 ESF CSU ACE. • Automatic ESF to D4 frame conversion • Wall mount -48 VDC power supply eliminates the need for an external power supply. • Power cable enables customers to use their own -48 VDC supply.
Chapter 1. Introduction Interface Features NI (Labeled NET) The network interface (NI) port complies with the applicable ANSI and AT&T standards.
Chapter 1. Introduction FOUR METHODS OF CONTROL Front Panel The front panel provides complete and easy control of all items that can be configured through menu guided options. The front panel LCD displays the status of operation and performance reports for the unit. A complete discussion of the operation of the front panel and all the menu options is found in Chapter 3, Operation, on page 3-1. ADTRAN PC Program T-Watch is the ADTRAN PC control program.
Chapter 1. Introduction ASCII Terminal The ADTRAN T1 ESF CSU ACE recognizes an escape sequence that puts the unit into the ASCII terminal mode. After receiving the sequence, the T1 ESF CSU ACE sends front panel information to the terminal. This interface acts exactly like the front panel, but the advantage is that it can be accessed remotely (through a modem).
Chapter 1. Introduction operation to confirm continued correct functioning. The background tests include the standard background network performance monitoring as required by ANSI T1.403 andAT&T 54016, for which the results are stored. Loopback Tests A number of different loopbacks can be invoked locally from the front panel, by T-Watch commands, or remotely by using special inband codes (AT&T network loop-up and loop-down codes).
Chapter 1. Introduction DTE Interface Loopbacks Loops all data from the terminal interface (T1) back towards the T1. This loopback may be initiated using front panel, EIA-232 control port, or T-Watch commands. The DTE (or external test equipment) must provide any test pattern in order to check the DTE interface. See Figure 1-5. Figure 1-5. DTE Interface Loopback Pattern Generation The T1 ESF CSU ACE offers three test patterns: All Ones, All Zeros, and 1:8.
Chapter 1. Introduction APPLICATIONS Three applications are shown in this section. Figure 1-6 shows a general data application; Figure 1-7 on page 1-12 shows a general voice application; and Figure 1-8 on page 1-12 shows a channel bank application. Figure 1-6.
Chapter 1. Introduction Figure 1-7. General Voice Application DSX-1 DSX-1 Figure 1-8.
Chapter 2 Installation UNPACK AND INSPECT Carefully inspect the T1 ESF CSU ACE for any shipping damages. If damage is suspected, file a claim immediately with the carrier and then contact ADTRAN Technical Support. If possible, keep the original shipping container to ship the T1 ESF CSU ACE back for repair or to verify damage during shipment.
Chapter 2. Installation POWER CONNECTION The T1 ESF CSU ACE can be powered in one of two ways: • A wall-mount -48 VDC power supply (supplied with the unit) • A power cable for use with an on-site -48 VDC power supply Both have a three-pin receptacle that plugs into the power connection on the bottom right edge of the T1 ESF CSU ACE. Once power has been applied to the unit, the power LED turns on. See Figure 2-1 for an illustration of the cable installation.
Chapter 2. Installation WIRING The connectors are described in this section. RJ-48C Connectors Two RJ-48C connectors are located on the top end of the T1 ESF CSU ACE. The NET connector connects the unit to the network. The connector marked CPE connects the unit to the data terminal equipment. These connectors have exactly the same pinouts. See Table A-1 on page A-2 for the RJ-48 connector pin assignments.
Chapter 2. Installation POWER-UP TESTING AND INITIALIZATION When shipped from the factory, the T1 ESF CSU ACE is set to factory default conditions; it is not initialized. At the first application of power, the unit automatically executes self test followed by an initialization sequence that sets up the unit. Self Test Upon a power-up or self test, the LCD displays ADTRAN T1 ESF CSU ACE INITIALIZING and the LEDs illuminate momentarily.
Chapter 3 Operation The T1 ESF CSU ACE can be configured and controlled via the local front panel, the EIA-232 control port, or T-Watch. This chapter describes configuration from the front panel.
Chapter 3. Operation FRONT PANEL OPERATION The T1 ESF CSU ACE front panel operating functions are shown in Figure 3-1 and defined in this section. Figure 3-1.
Chapter 3. Operation GENERAL MENU OPERATION The T1 ESF CSU ACE uses a multilevel menu structure containing both menu items and data fields. All menu operations and data are displayed in the LCD window. The menu items are numbered and can be viewed by using the up and down SCROLL keys. Description of Menu Tools Data Field A menu item followed by a colon (:) identifies a field available for editing. Display Field This menu field contains alarm or error information.
Chapter 3. Operation 2. With the cursor on the number 2), press the Enter key. The unit responds by displaying the first two available submenu fields. The cursor is on the first field. If there are more than two menu fields, a down arrow is visible on the lower right corner. See Figure 3-3. Figure 3-3. Menu with Additional Item(s) Not Shown Selecting a Submenu Item To select the desired submenu item (similar to selecting a Main menu item), follow these steps: 1.
Chapter 3. Operation Setting/Cancelling the Data Field Data fields available for editing are preceded by a colon (:). To set a data field, perform the following steps: 1. Press Enter while the cursor is located on the submenu item number. The cursor moves to the data field (to the right of the submenu item name). See Figure 3-5. Figure 3-5. Editing a Data Field 2. Use the up and down SCROLL keys to scan the available value settings displayed one at a time in the data field position. 3.
Chapter 3. Operation View Display Only Data Fields An example of a display only data field is found by selecting the following menu choices: 1. Select 1)STATUS from the Main menu. 2. Select submenu 2)NI ERR/ALM. 3. LOSS OF SIGNAL INACTIVE/ACTIVE is displayed, giving the current state of the alarm. Exiting or Returning to Previous Menus Press the Cancel key to exit a menu field or return to a previous menu level. MENU STRUCTURE The T1 ESF CSU ACE uses hierarchical menus to access its many features.
Chapter 3.
Chapter 3. Operation 1)NI PERF RPTS 2)NI ERR/ALM 1)STATUS 3)NI HISTORY 4)T1 ERR/ALM 2)CONFIG 1)NETWORK (NI) 5)T1 HISTORY 2)UNIT MAIN MENU 3)TERMINAL (T1) 1)TIME/DATE 2)SOFTWARE REV 3)UTIL 3)REINIT UNIT 4)ADDRESS: 4)TEST 1)LOCAL LOOPBK: 5)SET PASSCODE: 2)REM LB: 6)FACT RESTORE 3)TEST PATTERN: 7)REMOTE T-WATCH 4)RUN SELFTEST Figure 3-8. Four Opening Menus and First Level Submenus Menu flow is normally depicted from left to right.
Chapter 3. Operation The Four Opening Menu Functions STATUS The Status menu lets you view the status of the T1 ESF CSU ACE operation. This menu includes the following selections: NI PERF RPTS Use to view the user’s set of data on the Network Interface Performance Reports in compliance with ANSI T1.403 and AT&T Document TR54016. NI ERR/ALM Use to view current network interface errors/alarms reported by the T1 ESF CSU ACE. NI HISTORY Use to view and clear network interface history errors and alarms.
Chapter 3. Operation UTIL Use the Utility menu to view and set system parameters. This menu includes the following selections: TIME/DATE Access the display and set the current time and date. SOFTWARE REV Display the version number of the current software revision level. This information is required when requesting assistance from ADTRAN Customer Service or when updates are needed. REINIT UNIT Use to re-initialize the unit.
Chapter 3. Operation REM LB Use to send remote loopback codes to the far end T1 ESF CSU ACE. TEST PATTERN Use to select a test pattern to send out the network interface of the T1 ESF CSU ACE. RUN SELFTEST Use to initiate a self test.
Chapter 3. Operation DETAILED MENU OPERATION Menu flow is normally depicted from left to right. Arrows on the lower right of the screen indicate the direction of scrolling to view additional menu items. At every level of the menu, pressing the Cancel button returns the system to the previous menu level. Repeatedly pressing the Cancel button returns the system to the Main menu. 1)STATUS The Status menu branch lets you view the status of the T1 ESF CSU ACE operation. See Figure 3-9.
Chapter 3. Operation 1)NI PERF RPTS, Submenu of 1)STATUS The Network Interface Performance Reports menu item displays the user copy of the performance data. The T1 ESF CSU ACE maintains this performance data on the network in compliance with ANSI T1.403 andAT&T document TR54016. The data displayed is data accumulated over the last 15 minutes and over the last 24 hours. Figure 3-10. First Menu of NI PERF RPTS Menu These fields cannot be edited, only cleared, as previously discussed.
Chapter 3. Operation Terms that occur on the series of screens begun in Figure 3-11 include the following: Number of severely errored seconds Number of errored seconds Percent of available seconds Percent of error free seconds Number of code violations SES ES %AV %EF CVs Continue with standard operation procedures to exit the display.
Chapter 3. Operation Code Violations Bipolar violations (BPVs), frame bit errors, and cyclic redundancy check (CRC) errors in ESF or BPVs and frame bit errors in SF were received at NI Bipolar Violations BPVs in SF or ESF at NI Frame Bit Errors Frame bits received incorrectly at NI 3)NI HISTORY, Submenu of 1)STATUS The NI History menu is used for viewing history of errors and alarms on the network interface. If an alarm has occurred since the last Clear History selection, the menu will be active.
Chapter 3. Operation 2)CONFIG Use the Configuration menu to set the T1 ESF CSU ACE operational configuration, including all of the network interface parameters and the terminal interface parameters. See Figure 3-14. 1)FORMAT 2)CODE 1)NETWORK (NI) 3)YEL ALRM 4)XMIT PRM 5)KEEP ALIVE 6)BIT STUFFING 7)SET LBO 8)NET LB 9)RX SENSITIVITY 2)CONFIG 1)MODEM INIT 2)UNIT 1)CONTROL PORT 2)ALARMS 2)DATA RATE 1)TRAPS 2)OUTPUT 3)TEL NUM 3)TERMINAL (T1) 1)FORMAT 2)CODE 3)SET LBO Figure 3-14.
Chapter 3. Operation Continue with standard operating procedures to edit the Network Interface parameters. The fields and parameters available are as follows: 1)FORMAT Sets the frame format for the NI. The factory default is ESF. D4 ESF D4 is equivalent to superframe format (SF). 2)CODE Sets the line code for the NI. The factory default is B8ZS. AMI B8ZS 3)YEL ALRM Enables and disables the transmission of yellow alarms. The factory default is ENABLED.
Chapter 3. Operation 4)XMIT PRM Enables and disables the transmitting of performance report messages (PRM) data on the facility data link (FDL). The PRM data continues to be collected even if PRM is disabled. (Possible only with ESF Format.) The factory default is OFF. OFF ON 5)KEEP ALIVE Selects framed or unframed keep alive signal to be transmitted from NI when TI is in red alarm. The factory default is UNFRAMED.
Chapter 3. Operation 8)NET LB When enabled, the T1 ESF CSU ACE responds to loopback codes from the network interface. The factory default is ENABLED. ENABLED DISABLED 9)RX SENSITIVITY Selects the sensitivity of the receiver on the network interface. The factory default is NORMAL. NORMAL EXTENDED For most applications, the normal sensitivity setting is sufficient. If more sensitivity is required, the extended sensitivity setting may be used.
Chapter 3. Operation 1)CONTROL PORT Used to set up the unit to initialize a modem and the control port data rate. 1)MODEM INIT - The T1 ESF CSU ACE is capable of initializing a modem. Prior to modem initialization it should be physically connected to the T1 ESF CSU ACE and the power turned on. At this point, an industrystandard AT command string is used to initialize the modem. The string is also used following future powerup sequences. The factory default is DISABLED.
Chapter 3. Operation 2)OUTPUT - Selects whether the alarm traps (if enabled) are sent directly, or whether the telephone number stored in the T1 ESF CSU ACE should be dialed first (industry-standard AT dial command sent to modem). The factory default is DIRECT. DIRECT DIAL 3)TEL NUM - This is the telephone number dialed to obtain alarm traps. The string can be up to 20 characters in length and is terminated with a semicolon (;). A colon (:) is used to represent a pause in the dial string.
Chapter 3. Operation 2)CODE Sets the line code for the T1. The factory default is B8ZS. AMI B8ZS 3)SET LBO Sets the transmit LBO for the T1. The factory default is 0 - 133 feet. 0 - 133 feet 133 - 266 feet 266 - 399 feet 399 - 533 feet 533 - 655 feet 3)UTIL Use the Utility menu to view and set system parameters. See Figure 3-17. This includes setting the time and date and resetting all parameters to factory values or to re-initialize the unit.
Chapter 3. Operation 1)TIME/DATE, Submenu of 3)UTIL This menu option is used to view or edit the current time and date. The time and date are maintained during power off conditions. Use arrow keys and Enter to set the date and the desired hour, minutes, and seconds. Figure 3-18. Time/Data Screen Pressing Enter after any numeric change always records the entry and moves to the next editing position.
Chapter 3. Operation 4)ADDRESS, Submenu of 3)UTIL Use this submenu to access the current Unit Address setting. Unit identification numbers must be between 000 and 999. See Figure 3-19. Figure 3-19. Re-initialize Unit/Address Screen 5)SET PASSCODE, Submenu of 3)UTIL Use this submenu to access the passcode setting needed to control port access. The Unit Identification number is limited to four digits between 0001 and 9999.
Chapter 3. Operation 3)SHELF SLOT Enter the slot number of the far-end rackmount unit (1-16). This type of communication may not be available with all T1 products. 4)TEST Use the Test menu to initiate different types of tests of the unit and view test results. The menu contains four sub-items. See Figure 3-20. The execution of tests disrupts some of the normal operation. See individual menu items concerning tests before executing.
Chapter 3. Operation Tests are used to control the activation of loopbacks, the initiation of data test patterns, and self test execution. 1)LOCAL LOOPBK, Submenu of 4)TEST Four choices are available for setting the local loopback: NO LOOPBACK DTE ON LINE ON PAYLOAD ON Deactivates the loopback Activates the DTE loopback Activates the line loopback Activates the payload loopback Figure 3-21.
Chapter 3. Operation When a loopback method is selected, the T1 ESF CSU ACE displays LOOPING in the top right corner of the LCD and the yellow LOOPBACK LED is turned on. When the T1 ESF CSU ACE determines that the far-end T1 ESF CSU ACE has looped up, the T1 ESF CSU ACE displays LOOPED. If the T1 ESF CSU ACE does not recognize the remote T1 ESF CSU ACE looped up after about 10 seconds, the T1 ESF CSU ACE sends the appropriate loop-down code and displays FAILED, and the LOOPBACK LED is turned off.
Chapter 3. Operation Upon invoking the command, the LCD displays INITIALIZING and test failures are displayed in the LCD window. Figure 3-22. Self Test Result Screen If a failure is detected, note the failure prior to contacting ADTRAN technical support. The execution of a self test disrupts normal data flow and prevents remote communication until the self test is completed (approximately five seconds).
Appendix A Pinouts (Cable plug view, not unit) 1 2 3 Number 1 2 3 Type Frame GND 48 VDC GND Color Green Red Black Figure A-1.
Appendix A. Pinouts Table A-1. RJ-48C Connector Pin Assignments Pin Description NET CPE 1 R1 Receive data (from network to CSU) Transmit data (from CSU to DTE) 2 T1 Receive data (from network to CSU) Transmit data (from CSU to DTE) 3 -- Not used Not used 4 R Transmit data (from CSU to network) Receive data (from DTE to CSU) 5 T Transmit data (from CSU to network) Receive data (from DTE to CSU) 7 -- Not used Not used 8 -- Not used Not used Table A-2.
Appendix B Specification Summary SPECIFICATIONS AND FEATURES Specifications and features of the T1 ESF CSU ACE are provided in this chapter. Network Interface DSI interface per AT&T 62411 and ANSI T1.403 Network Framing Format D4 (SF) or ESF Network Line Code AMI or B8ZS Network TX LBO Auto or manual from 0.0 to -22.5 dB Performance Monitoring As per ANSI T1.403 and AT&T 54016 DTE Interface DSX-1 interface per ANSI T1.
Appendix B. Specification Summary Monitor and Configuration Access • Front panel keypad and display • EIA-232 control port • T-Watch over FDL (ESF only) Diagnostics • Self Test • Local Loopbacks • Remote Loopbacks • Test Patterns Environment Temperature: Operating 0 to 50 deg C (32 to 122 deg F) Storage -20 to 70 deg C (-4 to 158 deg F) Relative humidity: Up to 95%, noncondensing Hardware Specifications • Dimensions: 1.585”H x 7.20”D x 4.05”W B-2 • Weight: 1 lb.
Appendix C Acronyms/Abbreviations ACK................... acknowledgment ANSI ................. American National Standards Institute AR...................... access rate ARP ................... address resolution protocol async ................. asynchronous BECN ................ backward explicit congestion notification BOP ................... bit oriented protocol CCITT ............... Consultive Committee for International Telephony and Telegraphy CD .....................
Appendix C. Acronyms/Abbreviations DLCI.................. data link connection identifier DSAP................. directory scope analysis program DSR ................... data set ready DSU ................... data service unit DTE ................... data terminal equipment DTR ................... data terminal ready FDL .................... facility data link FECN ................. forward explicit congestion notification FEP..................... front end processor FIFO..................
Appendix C. Acronyms/Abbreviations OOS................... out of service PLAR................. private line automatic ringdown PPP .................... point to point protocol PU ...................... physical unit PVC ................... permanent virtual circuit RD ..................... receive data RDL ................... remote digital loopback RFC.................... request for comments RFECN .............. remote forward explicit congestion notification RIP.....................
Appendix C. Acronyms/Abbreviations VRC ................... vertical redundancy check WAN.................. wide area network XID .................... exchange identification XMIT .................
Appendix D Glossary 4-wire Switched 56 An AT&T proprietary 56/64 kbps switched digital data service offered by telco service providers and delivered to users over 4 copper wires. Compatible with the T1 ESF CSU ACE 4-wire Switched 56 DBU option. ANSI American National Standards Institute. Devices and proposes recommendations for international communications standards.
Appendix D. Glossary the frame relay frame off each LAN frame, and passes the LAN frame on to the end device. Bridges are generally used to connect LAN segments to other LAN segments or to a WAN. They route traffic on the Level 2 LAN protocol (e.g. the Media Access Control address), which occupies the lower sub-layer of the LAN OSI data link layer. See also router. CCITT Consultive Committee for International Telephony and Telegraphy.
Appendix D. Glossary ple, a digital PBX, a PC, or data communications device. A CSU performs certain line-conditioning and equalization functions, and responds to loopback commands sent from the central office. A CSU regenerates digital signals. It monitors them for problems, and provides a way of testing the digital circuit. CTS clear to send. A signal on the DTE interface indicating that the DCE is clear to send data. dB decibel.
Appendix D. Glossary DSU loopback A telco initiated test which loops the DSU back to the telco and is used to test the DDS circuit as well as the DSU/CSU. DTE data terminal equipment. The end-user terminal or computer that plugs into the termination point (DCE) of a communications circuit. The main difference between the DCE and the DTE is that pins two and three are reversed. encapsulation A process by which an interface device places an end device's protocol-specific frames inside a frame rely frame.
Appendix D. Glossary file server In the context of frame relay network supporting LAN-to-LAN communications, a device connecting a series of workstations within a given LAN. The device performs error recover and flow control functions as well as end-to-end acknowledgment of data during data transfer, thereby significantly reducing overhead within the frame relay network. frame-relay-capable interface device A communications device that performs encapsulation.
Appendix D. Glossary ingress Frame relay frames leaving from an access device in a direction toward the frame relay network. interface device Provides the interface between the end device(s) and a frame relay network by encapsulating the user's native protocol in frame relay frames and sending the frames across the frame relay backbone. See also encapsulation and frame-relaycapable interface device. ISDN Integrated Services Digital Network. A network architecture that enables end-toend digital connections.
Appendix D. Glossary ping An internet protocol standard that provides loopback on demand for any device in an IP network. One device "pings" another by sending a loopback request to the device's IP address. point-to-point Type of communications link that connects a single device to another single device, such as a remote terminal to a host computer. PVC permanent virtual circuit. A frame relay logical link, whose endpoints and class of service are defined by network management. Analogous to an X.
Appendix D. Glossary SDLC synchronous data link control. A link-level communications protocol used in an international business machines (IBM) systems Network Architecture (SNA) network that manages synchronous, code-transparent, serial information transfer over a link connection. SDLC is a subset of the HDLC protocol developed by ISO. service The provision of telecommunications to customers by a common carrier, administration, or private operating agency, using voice, data, and/or video technologies.
Appendix D. Glossary trunk line A communications line connecting two frame relay switches to each other. VT-100 A non-intelligent terminal or terminal emulation mode used for asynchronous communications. Used to configure the T1 ESF CSU ACE.
Appendix D.
Index Numerics CONTROL PORT 3-19 control port 1-6 customer service xi 1 in 8 pattern 1-10 A ACCESS TYPE (REMOTE UNIT) 3-23 ACES help desk how to contact, xi ADDRESS 3-10, 3-23 ADTRAN PC program 1-7 affidavit connection for digital services, iv connection of CPE equipment, v ALARMS 3-19 all ones pattern 1-10 all zeroes pattern 1-10 applications 1-11 applications engineering how to contact, xi arrows, menus 3-3 ASCII terminal 1-8 D D4 superframe 1-1 DATA RATE 3-19 display field 3-3 DTE interface loopback
Index J power-up testing 2-4 product service, xi product warranty, x jack signal directions 1-5 R network interface 1-6 T1 (CPE) 1-6 REINIT UNIT 3-10, 3-22 REM LB 3-10, 3-25 REMOTE T-WATCH 3-10, 3-23 repair and return information, xi RJ-48C connector 2-3 RMA requests xi RUN SELFTEST 3-11, 3-26 RX SENSITIVITY 3-18 K KEEP ALIVE 3-17 L line loopback 1-9 LOCAL LOOPBACK 3-10 LOCAL LOOPBK 3-25 loopback tests 1-9 M menu arrows 3-3 Configuration 3-15 data field 3-3 example operation 3-3 exiting or returnin
Index training department how to contact, xii TRAPS 3-19 T-Watch 1-7 U UNIT 3-9, 3-18 UTIL 3-9, 3-21 Utility menu 3-21 61203025L1-1 W warranty, x wiring 2-3 X XMIT PRM 3-17 Y YEL ALRM 3-16 T1 ESF CSU ACE User Manual Index-3
Index Index-4 T1 ESF CSU ACE User Manual 61203025L1-1
