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AT&T 3.0 manual Index

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Troubleshooting Install Error codes Tie Trunk Signaling Password Check the Error Logs Connecting Data Equipment Warranty Maintenance Data Station Configurations

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IN-6Maintenance and Troubleshooting

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AT&T 3.0 manual Index

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AT&T Warranty Copyright 1994, AT&T All Rights Reserved AugustSecurity of Your System Preventing Toll Fraud Trademarks Contents Connecting the Control Unit to the Network Interface Installing the PC, CAT, or Printer Installing Applications Unit Load Calculation Worksheet Figures MFM Connecting the Control Unit to the Network Interface Installing the PC, CAT, or Printer Ground-Start Button Tables Merlin Mail Ports Required Important Safety Instructions Page Safety Safety Xviii Installation How to Use This Book Intended Audience Xx Installation Terms and Conventions Used Lines, Trunks and Facilities Product Safety Labels Example Purpose Security Related Documents System Documents How to Comment on This Document AT&T How to Comment on This Document Xxvi Installation Merlin Legend Communications System Release Order No -630-140 Date August Installation Sequence Introduction System Forms Connecting the Network Interface Installling the Control UnitInstalling Telephones Required Adjuncts Optional Upgrading the System Connecting Data EquipmentProgramming the System Installing the Control Unit Overview Environment Electrical Noise/Radio-Frequency Interference Control Unit Requirements Hardware Preassemble Process Backboard Requirements AC Power and Grounding Installing the BackboardPage AC Grounding Requirements AC Power Requirements Parameter Value Using an Ideal 61-035 Circuit Tester or Equivalent Unplug the circuit tester Measuring the AC Outlet Voltages Grounding Requirements Central Office and AC Grounds Approved Grounds Central Office Trunk Protection Heavy Lightning Protection Installing 146A and 147A Protectors Checking Unit Loads Unit Loads for Hybrid/PBX ModeUnit Loads Auxiliary Power Units Installing the Basic CarrierUnit Loads for Key or Behind Switch Mode Marking the Basic Carrier Screw Holes Installing the Power Supply Turning Off the Power Installing a Copper Shield Installing the Power Supply Installing a Copper Shield in the Power Supply Installing the Power Supply Module Carrier Installing the Ferrite Cores Installing the Ferrite Cores Installing the Auxiliary Power Unit Installing an Auxiliary Power Unit Installing Expansion Carriers Connecting the Carriers Installing the Processor Installing the Processor in the Carrier Push firmly until the processor snaps into place 10. Installing the Processor into the Carrier Installing the Modules Guidelines Installing Modules Tie Trunk Signaling Signaling ModesSignaling Types Tie Trunks Mode 400EM Tie Trunk Module DIP SwitchesSimplex Mode Signaling Formats for the 400EM Tie Trunk Module Merlin 11 EM Module Sample Dip Switch Settings for Signaling Types Labeling 12. Line/Trunk and Telephone Jack Locations on Each Module Replacing a Module Installing the Control Unit 13. Removing Modules from the Carrier Connecting the Control Unit to An AC Outlet Powering Up the System Turn on the power switch on the basic carrier power supply Powering Down the System Unplug the system from the AC outlet Powering Down the System 46Installing the Control Unit Installing Telephones Adjuncts Installing Multi-Function Modules Considerations Risk of Electrical Shock Follow all warnings and cautions Removing the User Card Tray and Line Cable Releasing the Deskstand Removing the Deskstand Releasing the Module Cover Screw Release and remove the module cover. See -5, -6,and Figure Releasing the Module Cover Removing the Module Cover Removing an MFM Module Installing an MFM Module Install the new MFM. See Figure Multi-Function Module 11. Removing the Jack Guard To remove the jack guard, see Figure 12. Placing the Module Cover into the Locating Slot To replace the module cover, see -12, -13,and Figure 13. Lowering and Locking the Module Cover 14. Replacing and Tightening the Module Cover Screw 15. Replacing the Deskstand 16. Lowering the DeskStand and Locking into Place 17. Replacing the User Card Tray and Line Cable Replace the user card tray and line cable. See Figure Adjust the deskstand height. See Figure Power up the telephone. See Figure 19. Powering Up the Telephone after Installing the MFM Attach the adjunct to the MFM. See Installing Adjuncts Test the MFM for T/R operation 20. Routing the Cords Through the Cord Channel To connect an adjunct to a single-line telephone General Purpose Adapter To connect an adjunct to an analog multiline telephone Dial Dictation Devices Credit Card Verification Terminals Group Calling Delay Announcement DevicesFax Machines Headsets Headpieces Manual Operation Analog Multiline Telephones Only One-Touch Operation All Telephones Loudspeaker Paging Systems 21. Manual and One-Touch Headset Operation Dual-Tone Multifrequency Dtmf Signaling 22. Single-Zone Paging with PagePac Plus 23. Single-Zone Paging with Customer-Supplied Amplifier 24. Single-Zone Paging with Upam Merlin Identifier Modems Music On Hold and Magic on Hold 36Installing Telephones and Adjuncts Music Port Supplemental Alerts Supplemental Alert Adapter 27. Installing the Supplemental Alert Adapter Unsupported Telephones, Adjuncts Adapters Single-Line Telephones Unsupported Telephones and Adjuncts Model Single-Line Telephones Description Single-Line Telephones in Release 3.0 and Later Installing Direct Station Selectors Wire the two DSSs. See Figure Adjust the angle of the DSSInstall the D8AC cord on the DSS 28. Connecting One or More DSSs Wire the telephone to the DSS units. See Figure 29. Wiring for Auxiliary Power Label the DSS designation cards Assembling MLX Telephones Considerations 30. Adjusting or Removing the Deskstand Remove or adjust the deskstand. See Figure 31. Connecting the Line Cords Connect the line cords. See Figure Connect the handset Label the extension identification card 33. Labeling the Extension 34. Removing the Handset Holder Prepare the handset holder for wall-mounting Replace the extension label and plastic cover Wall mounting an MLX-10, MIX-10DP, or MlX-10D telephone 37. Mounting the Backplate 38. Routing the Cord Through the Backplate Label the button assignment card Installing Cordless or Cordless/Wireless Telephones MDW 9000 Cordless/Wireless TelephonesAdjust the contrast on the telephone% display MDC 9000 Cordless Telephone Connecting Telephones To the Control Unit Installing Telephones and Adjuncts Wiring a Telephone for Two Voice Pairs Even D8W Removing Damaged Connecting Blocks Remove the wires or the patch cord from the connecting block 40. Removing the Connecting Block Page Connecting the Control Unit to Network Interface Wiring Network Interfaces Description Adapter Did RJ21X Interface RJ21X Network Interface Connector Building the Wiring Field RJ21X Wiring Field Hardware RJ21X Wiring Field Tools Using the D-Impact Tool to Seat the Conductors See Labeling Trunks, later in this chapter, for instructions RJ11 and RJ14 Interfaces RJ11 and RJ14 Interfaces RJ2GX Interface RJ48C/X Interface Testing TrunksTesting Loop-Start Trunks Testing Ground-Start Trunks Installing the Channel Service Unit Labeling Trunks Acculink CSUs Page 3150 Front Panel Page Installing the PC, CAT, or Printer Connecting a PC to the Control Unit Connecting a PC Within 50 Feet Connect the D8W cord Connecting a PC Within 50 ft .2 m Connecting a PC More Than Feet 15.2 m Away Page Connecting a PC More Than 50 ft .2 m Away Connecting a CAT To the Control Unit Connecting a Printer To the Control Unit 8Installing the PC, CAT, or Printer Connecting a CAT and Printer On the Same AC Outlet Connecting a CAT and Printer on a Different AC Outlet Connecting a CAT and Printer on the Same AC OutletPage Page Merlin Smdr Page Connecting a Printer Within 50 Feet 15.2 m Connecting a Printer Within 50 ft .2 m Connecting a Printer 50 Feet Or More Away 18Installing the PC, CAT, or Printer Connecting a Printer More Than 50 ft .2 m Away Connecting the 24813 Adapter and the 201213 Transformer Setting Printer Options and DIP Switches AT&T 572 Printer Options Function Menu Status On next Function Menu Status BPS AT&T 475/476 Printer DIP Switch Settings Switch AT&T CAT Printer DIP Switch Settings Control Switch DIP 2-CMPage Connecting Data Equipment Data Stations Station For voice Data Station ConfigurationsTelephone GPA or Modem Data Stations 7500B Data Stations Analog Voice and Modem Data Stations GPA SettingsSetting Up Connect the modem to the GPA Connect the GPA to the analog multiIine telephone Analog Voice and Modem Data Equipment Configuration Modem Data-Only Stations Connect the modem to the control unit Modem Data-Only Equipment Configuration Modem Data and MLX Voice Equipment Configuration MLX Voice and Modem Data Stations Connect the modem to the MFM in the MLX telephone Connect the MLX telephone to the control unit MLX Voice and 7500B Data Stations MLX Voice and 7500B Data Equipment Configuration Connect the 7500B data module to the control unit 7500B Data-Only Stations B Data-Only Equipment Configuration Video Conferencing Data Stations Acculink 3150 CSUPage Video Conferencing Configuration Page 7500B Data Module and CSU Settings B Data Module Settings Kbps Initializing and Testing System Initializing the System Programming Guides Restoring from the Translation Memory CardRestoring from the System Programming Disk Perform a System Erase frigid start Testing MLX Telephones Setting the Time and DateTesting the System Page Testing MLX Display Telephones Testing MLX Telephones with MFMsHang up the handset to leave test mode Press the unlabeled display buttons Testing Telephones for Dial Tone Testing Telephones for Outside Dial ToneHang up Turn off the Message light Testing Analog Multiline Single-Line Telephones Testing did Trunks Dial *03 followed by the trunk ID number 01 through Testing Incoming Automatic-Start Tie Trunks Testing Tie TrunksTesting Two-Way Automatic-Start Tie Trunks Testing Outgoing Automatic-Start Tie Trunks Testing Two-Way Dial-Repeating Tie Trunks Testing Incoming Dial-Repeating Tie TrunksTesting Outgoing Dial-Repeating Tie Trunks Verify that you have good two-way communication and hang up Testing Selected System Features ARS and Smdr Tests Group Calling Test System Speed Dial Test Coverage Test Testing the DSS Testing Night Service Testing the Dictation System Testing the Paging System Hang up Repeat Steps 1 through 3 for all paging zones Testing Music On HoldMake an announcement into the handset Testing the Power Failure Transfer Jacks Ground-Start Button If you hear reorder tone, try again Testing Touch-Tone ReceiversHave that person call the number after you hang up Repeat the test for each TTR Installing the Control Unit’s HousingInstalling the Top Cover Top Cover Installing the Front Cover Installing the Control Unit Front Cover Installing Applications Voice Messaging Systems Touch-Tone Receivers Automated Document Delivery System Call Accounting System Hardware Requirements Hardware and Software Requirements Page Call Accounting Terminal CAS Documentation 8Installing Applications Call Management System CAT Documentation Hardware and Software Requirements CMS Documentation Conversant Consideration Integrated Solution Conversant Intro Documentation Hardware Requirements Installing Applications AT&T Attendant Merlin Mail Merlin Mail Ports Required Number of Jacks Required Considerations Hardware Requirements Merlin PFC Behind Switch Mode Hybrid/PBX and Key Modes PassageWay Direct Connect Solution Hardware Requirements System Programming Maintenance SPM Hardware Requirements Page Upgrading the System Removing the Control Unit Housing Removing the Control Unit Housing 4Upgrading the System Powering Down the System Install any expansion carriers Install or replace any modulesUpgrading the Control Unit Replace the processor module. See Figure Replacing the Housing Clips Remove the housing clips from the right side of the module Beware of hazardous voltages Replacing a Module in the Carrier Modifying the Processor For Key Mode Removing the Processor Module Cover Removing the Processor Module Circuit Board Changing the Key Mode Switch Position to Closed Completing the Upgrade Install SPM Backup system programming Convert the backup file If applicable, program new featuresInstall SPM Remove the control unit housing Program the system Replace the control unit housingRelease 2.0 or Earlier Installing the Control Unit Housing Completing the Upgrade 18Upgrading the System System Numbering Forms Form 2a, System Numbering Extension Jacks Figure A-1. Form 2a, System Numbering Extension JacksPage Form 2b, System Numbering Digital Adjuncts Figure A-2. Form 2b, System Numbering Digital Adjuncts Form 2c, System Numbering Line/Trunk Jacks Figure A-3. Form 2c, System Numbering Line/Trunk Jacks Form 2d, System Numbering Special Renumbers Figure A-4. Form 2d, System Numbering Special Renumbers Unit Load Calculation Worksheet Unit Load Worksheet Module Qty Unit Load = Total Did Network Access Lines Qty EquipmentTelephones Unit Load Hybrid/PBX or Modified = Total Square Optional Equipment Page DS1 GS/LS Qty Unit Load = Total Hybrid/PBX or Modified Square Page Unit Load Calculation Worksheet 10Installation Index IN-2Installation Installation IN-3 IN-4Installation Installation IN-5 IN-6Installation Installation IN-7 IN-8Installation Installation IN-9 Index IN-10Installation Maintenance and Troubleshooting Copyright 1994, AT&T All Rights Reserved August Contents Error Logs, Access Logs, and System Inventory Central Office Problems GL Glossary Index Figures Backing Up with a Memory CardChapter Name Function of PC Keys in SPM Tables LMPORTANT Safety lNSTRUCTlONS Page Safety Safety Xiv Maintenance and Troubleshooting About This Book Terms and Conventions Used Typographical Conventions On next Product Safety Labels Document No. Title System DocumentsTelephone User Support System operator Support Documentation for Qualified Technicians Document No TitleMiscellaneous User Support Feedback Form Maintenance Terminal Equipment Tools MLX-20L Failure On-Site Programming MaintenanceSetting Up the MLX-20L Console Figure l-l. Setting Up the MLX-20L Console Setting Up the PC Setting Up the PC Remote Programming Maintenance Setting Up Equipment for Remote Maintenance Connect the PC and modem Using SPM Starting SPMWith a Direct Local Connection Press any key When you hear the modem tone, hang up Enter the passwordWith a Local or Remote Modem Connection Dialing the System Operator Dialing the Modem Directly Console Display/Instructions Select an option SPM Display SPM Display Function of PC Keys in SPM Console SPM Function Conf ←Bksp Exiting SPM Preparation for Hardware MaintenanceRemoving the Control Unit Housing 16Introduction Disconnecting AC Power Disconnecting AC Power Maintenance Strategy Maintenance Strategy Automatic Tests AlarmsTrouble Reports Clearing Alarms System Restarts Warm Start Cold Start Restart Frigid Start System Erase Isolating the Trouble Check Telephone ProblemsCheck the Error Logs Check the power supply LED Trouble Accessing the Error LogsCheck the Access Log Check the Power Supply Check the ProcessorCheck the Modules Check the Control Unit Carrier Check the Central Office Escalating the ProblemCheck the Trunks Checking Unit Loads Unit Loads for Hybrid/PBX ModeUnit Loads for Key or Behind Switch Mode 28Introduction Error Logs, Access Logs, System Inventory Error Logs Checking the Error Logs Transient/Permanent Error Thresholds Code Error DescriptionMore → More → Error Log Summary Select an error log option From the Maintenance menu, select the System optionSelect Error Log Checking Transient Errors Console Display/Instructions Additional Information PC Checking the Last 10 Errors Interpreting Error Codes Error Codes Action Description 000l Error Action Codes Description Start 8Error Logs, Access Logs, and System Inventory Error Codes Description Action Full 10Error Logs, Access Logs, and System Inventory 6COA DS1 PRI B-CH Group Inconsist Error Codes Descrption Action 7404 Not in Standby Mode Miscellaneous Error On Hook Before Ready 840D Incorrect Firmware State Access Log Reviewing the Access Log Display the first screen of the Access Log Scanning the Log System Inventory More Reviewing the Screen Select the Inventory option Phantom Modules Xx = slot number entered in Step Telephone Problems Troubleshooting Telephone Problems Symptom Section Fixing Telephone ProblemsGeneral Telephone and Wiring Problems Check the LEDs on the module Analog Multiline Telephone Problems Voice Transmission ProblemsMove the T/P switch to its normal position If the LEDs do not light, retest the original telephone Single-Line Telephone Problems Call Forwarding Problems MLX Telephone Tests LEDs should toggle on and off MLX Telephone Display Buttons System Requirements For Touch-Tone ReceiversIf these tests fail, replace the MFM System Requirements for Touch-Tone Receivers Modules with TTRs No. of TTRs Control Unit Problems Backing Up System Programming Checking the LED Power Supply ProblemsChecking the Power Supply Checking the Interlocking Post Power Supply Interlocking Post Replacing the Ring Generator PEC and Apparatus Codes for 012 Modules App. Code 6Control Unit Problems Replacing a Ring Generator Replacing Auxiliary Power Units Replacing an Auxiliary Power Supply Replacing the Power Supply Power down the system Insert a new power supply Processor Problems Peek Select the Demand Test From the Maintenance menu, select the Slot optionSpecify Slot Select the Peek option Dial a memory address Poke Continue Select Continue Console Display/Instructions Additional InformationSelect Poke two times System Erase Frigid Start Select System Erase twice Forced Installation of System Software Select Yes Menu →Maintenance →System → Inserting a Memory Card Observe the memory card validation screens Initiate the software installationSelect Upgrade/install MemCard Rel Vnn.mm Current If the release number is the one you want, select Yes Error Conditions During Forced Installation Restore system programming Processor Problems Memory Card Is Corrupt Missing Card or Card Not Inserted CorrectlyMemory Card Is Wrong Type Other Error Conditions Power Cycle During InstallationRemoval of Memory Card During Installation System Busy Pressing hidden key two times will delete existing program If possible, save system programming Install the new processor module Power up the systemReplacing the Processor Module Replacing the Feature Module Replacing the Feature Module Module Problems Module Tests Module Test Process Module Test Process Busy-Out/Reset Power supplySystem Components Test Notes Busy-out or reset the module Run the internal Ioopback testRun the board controller test For 100D modules, continue with the CSU Ioopback test Persistent Module Problems Busy-Out and Reset Busy-Out Summary Specify the slot number n=00 to Console DispIay/Instructions Select Busy-Out Reset Summary Console Display/Instructions Additional Information P C Select Reset Specify the slot number nn = 00 to Restore Enter →Restore →Yes Specify the slot number n= 00 to Select the Restore option Internal Loopback Test Menu →Maintenance →Slot Select Internal Loopback Test Specify the slot number nn = 00 toSelect Demand Test Interpreting Test Results Screen below smearsI Restoring the Module Slot empty or not valid Board Controller Test Select the Board Controller Test Select Test Once or Repetitive Board aaaaaaaaaaaaaaaaa Channel Loopback Test Summary Select the B-Channel Loopback test From the main menu, select the Slot optionSpecify the MLX module’s 2-digit slot number nn = 00 to Screen below appears only if the test fails Channel Loopback Errors Error Messages Corrective Action Replacing Modules To replace a module, follow the steps below Checking Unlabeled Wiring Upgrading Circuit Module Firmware Summary Inserting the Upgrade Memory Card Select Upgrade Specify the slot number nn =00 to Module Problems Screens below appear during the procedure Observe the status screen below Error Conditions During Firmware Upgrade Memory Card In Use By Another Feature Module Cannot Be Upgraded Module Error Select Exit and reinitiate the upgrade procedure Xx = slot selected in Step Memory Card File ErrorFlash ROM Fails to Erase Board Memory Programming Failure 100D Module ProblemsUpgrade Attempted on an Empty Slot Error Events CSU Loopback Test Busy-out the 100D module Prepare the CSU 551 T1 CSU Loopback Connection ESF T1 CSU DTE Loopback Connection S t P b k L p b k P t r n s U E S FA t T e x t C n f i g LLB PLB DLB O p b a c k O r t L L B P L BO p b a c k Specify the 2-digit slot number Nn = 00 to Select the CSU Loopback Test Screen below appears when the test fails Fmwr not in Standby Node Automatic Tests for the 100D Module 100D Module Error Events Select the current hour or a previous hour Select Error EventsSpecify the 2-digit slot number nn= 00 to 100D Module Clock Status Enter →Clock →Exit From the Maintenance menu, select. the Slot option Select Clock Unplug the control unit from the AC outlet Carrier ProblemsRemoving the Faulty Carrier System Status Checking System and Slot StatusReplacing the Carrier Select Status Interpreting the System Status Screen Red LEDYellow LED Green LED Slot Status →Enter →Status Select the Status option F10 LED Checking System and Slot Status 92Control Unit Problems Trunk Errors Troubleshooting Trunk Problems Manual Correction of Trunk Problems Troubleshooting Trunk Symptoms Section If the module continues to malfunction, replace it Outgoing Trunk ProblemsCheck for outside dial tone at the network interface Incoming Trunk Problems Testing Trunks AutomaticallyMaintenance-Busy Status Place an incoming call through the troubled trunk Permanent Errors Maintenance-Busy Causes Maintenance-Busy Programming Ground-Start GS TrunkLoop-Start LS Trunk TieTrunk Checking Trunk Maintenance-Busy Status Summary Checking Ports From the Maintenance menu, select the Port option Select the Line/Trunk Option Checking Extension Maintenance-Busy Status Summary Select trunk Status Xxx = line number entered in StepSelect Next to see the status Next trunk Select the Station extension option Busying-Out a Trunk Summary Specify the dial plan number line for the trunk nnn = 801 to Busying-Out an Extension Summary 14Central Office Problems Screen below appears when Busy-Out is completed successfully Restoring a Trunk Summary Additional Information Restoring an Extension Summary Select Restore Resetting an RS-232 Port Console ProcedurePC Procedure → F1 → F3 Specify the RS-232 port Resetting the Processor’s Internal Modem Summary Select the Modem option Screen below is shown until Reset fininshes or fails Auditing DS1 PRI B-Channels Auditing Lines Summary Select the B-Channel option Select Audit Line Auditing Calls Summary Select Audit Call Conclusion of Hardware Maintenance Installing the Control Unit Housing Release 2.1 or Later To install the front cover, see -2and follow these steps Installing the Control Unit Top Cover Release 2.1 and Later Conclusion of Hardware Maintenance Front cover Installing the Control Unit Housing Release 2.0 or Earlier Assemble the control unit housing. See Figure Assembling the Control Unit Housing Release 2.0 and Earlier Installing the Control Unit Housing Release 2.0 and Earlier Customer Support Information Support Telephone Number Customer Support Information FCC Notification and Repair Information Page Installation and Operational Procedures DOC Notification and Repair Information DOC Certification No 4095A CSA Certification No. LR Load No Customer Support Information Maintenance and Troubleshooting A-9 10Maintenance and Troubleshooting Security of Your System Preventing Toll Fraud Page Limited Warranty Limitation of Liability 14Maintenance and Troubleshooting Voice Mail Systems Limitation of LiabilityPage Remote Administration Maintenance Page Figure B-1 Figure B-1. Form 2a, System Numbering Extension Jacks Page Figure B-2. Form 2b, System Numbering Digital Adjuncts Figure B-3. Form 2c, System Numbering Line/Trunk Jacks Figure B-4. Form 2d, System Numbering Special Renumbers Unit Load Calculation Worksheet Unit Load Worksheet MLX Network Access Lines Optional Equipment Page Telephones Unit Load Calculation Worksheet Page Page Backing Up with a Memory Card Card Types Figure D-1. Pcmcia Transition Memory Card Inserting the Card Figure D-2. Inserting the Memory Card Memory Card Formatting Unformatted Card Format Warning Procedure Backup BackupSummary Backup Select the System menu Select Back/RestoreSelect Backup Save your entry Select the backup filenameRename the backup file n = 1 to 11 characters Respond to the prompt Observe the backup progress screenObserve the backup completion screen Automatic Backup Summary Automatic Backup Procedure Automatic Backup Select Auto Backup Make a selection Select Off Daily Backup Procedure Erase the current daily backup time Backup Messages Erase the current weekly backup day and time = backup filename Backup CanceledCard Removed While Backup Is in Progress Card Missing or Card Not Inserted Correctly Card Is Write-Protected Card Failure Summary Restore Procedure Restore Select Restore Observe the restore progress screen Select the restore fileObserve the restore file validation screen Restore Messages Card Missing or Card Not Inserted Correctly Card Removed after Confirmation Wrong System Programming Port Release Mismatch Card Failure after Confirmation Wrong Type of Card Board Mismatch Strap in Place for Key Mode but Mode is Set To Hybrid Modifying a Release 2.1 or Earlier Processor for Key Mode Release 2.1 and Earlier Figure E-1. Modifying the Processor for Key Mode Installing the Control Unit Housing Release 2.1 and Earlier Figure E-2. Installing the Control Unit Housing Adds ALS AMI ANIARS Ascap AT&T Switched Network Audix Voice Power Asynchronous dataTransmission AT&T Attendant B8ZS BIS Board assignment Board renumbering Bus Button Byte CCS CASCAT CMS CSU CORCRC DHG DCEDFT Did DLC DnisDOS DS0 DSS DTE EIA ESF ESS FCC Frame Framing format frequency generator FRLGeneral-Purpose Adap See GPA Glare GPA Iclid HfaiHFU II/III Kbps Key mode IsdnIsdn 7500B Data Module Jack LED LANLDN Access Local loopLogical ID Loop-start trunk MLX-10DP MFMMLX-10 or MLX-10D telephone Glossary OPT OPX PBX PFT PRI QCC RAM ROM SAASDN SID Simplex signaling Single-line telephoneSlot Smdr System acceptance test System Access buttons Programming MaintenanceSupplemental Alert See SAA Adapter System date TDM TTR UPS VACVDC VMI Maintenance and Troubleshooting IN-1 IN-2Maintenance and Troubleshooting Maintenance and Troubleshooting IN-3 IN-4Maintenance and Troubleshooting Maintenance and Troubleshooting IN-5 Index

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