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AT&T 3.0 manual Conclusion of Hardware Maintenance Front cover

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Conclusion of Hardware Maintenance

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Figure 5-2. Installing the Control Unit Front Cover (Release 2.1 and Later)

Central Office Problems 5–33

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AT&T 3.0 manual Conclusion of Hardware Maintenance Front cover

Contents

AT&T Trademarks WarrantyCopyright 1994, AT&T All Rights Reserved August Security of Your System Preventing Toll FraudContents 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 Intended Audience How to Use This BookXx Installation Lines, Trunks and Facilities Terms and Conventions UsedExample Purpose Product Safety LabelsSecurity System Documents Related DocumentsAT&T How to Comment on This DocumentHow to Comment on This Document Xxvi Installation Order No -630-140 Date August Merlin Legend Communications System ReleaseIntroduction Installation SequenceSystem Forms Connecting the Network Interface Installling the Control UnitInstalling Telephones Required Adjuncts Optional Upgrading the System Connecting Data EquipmentProgramming the System Overview Installing the Control UnitEnvironment Control Unit Requirements Electrical Noise/Radio-Frequency InterferenceBackboard Requirements Hardware Preassemble ProcessInstalling the Backboard AC Power and GroundingPage AC Grounding Requirements Using an Ideal 61-035 Circuit Tester or Equivalent AC Power Requirements Parameter ValueMeasuring the AC Outlet Voltages Unplug the circuit testerGrounding 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 Installing a Copper Shield Turning Off the PowerInstalling the Power Supply Installing a Copper Shield in the Power Supply Installing the Ferrite Cores Installing the Power Supply Module CarrierInstalling the Ferrite Cores Installing the Auxiliary Power Unit Installing an Auxiliary Power Unit Installing Expansion Carriers Connecting the Carriers Installing the Processor Push firmly until the processor snaps into place Installing the Processor in the Carrier10. Installing the Processor into the Carrier Guidelines Installing the ModulesInstalling Modules Tie Trunks Tie Trunk SignalingSignaling Modes Signaling TypesMode 400EM Tie Trunk Module DIP SwitchesSimplex Mode Merlin Signaling Formats for the 400EM Tie Trunk Module11 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 Turn on the power switch on the basic carrier power supply Powering Up the SystemUnplug the system from the AC outlet Powering Down the SystemPowering Down the System 46Installing the Control Unit Installing Multi-Function Modules Installing Telephones AdjunctsConsiderations Risk of Electrical Shock Follow all warnings and cautions Removing the User Card Tray and Line Cable Releasing the Deskstand Removing the Deskstand Release and remove the module cover. See -5, -6,and Figure Releasing the Module Cover ScrewReleasing the Module Cover Removing the Module Cover Removing an MFM Module Install the new MFM. See Figure Installing an MFM ModuleMulti-Function Module To remove the jack guard, see Figure 11. Removing the Jack GuardTo replace the module cover, see -12, -13,and Figure 12. Placing the Module Cover into the Locating Slot13. 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 Replace the user card tray and line cable. See Figure 17. Replacing the User Card Tray and Line CablePower up the telephone. See Figure Adjust the deskstand height. See Figure19. Powering Up the Telephone after Installing the MFM Test the MFM for T/R operation Attach the adjunct to the MFM. See Installing AdjunctsTo connect an adjunct to a single-line telephone 20. Routing the Cords Through the Cord ChannelTo connect an adjunct to an analog multiline telephone General Purpose AdapterDial Dictation Devices Credit Card Verification Terminals Group Calling Delay Announcement DevicesFax Machines Headpieces HeadsetsOne-Touch Operation All Telephones Manual Operation Analog Multiline Telephones Only21. Manual and One-Touch Headset Operation Loudspeaker Paging SystemsDual-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 Modems Merlin IdentifierMusic On Hold and Magic on Hold 36Installing Telephones and Adjuncts Music Port Supplemental Alert Adapter Supplemental AlertsUnsupported Telephones, Adjuncts Adapters 27. Installing the Supplemental Alert AdapterUnsupported Telephones and Adjuncts Model Single-Line TelephonesSingle-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 Wire the telephone to the DSS units. See Figure 28. Connecting One or More DSSs29. Wiring for Auxiliary Power Label the DSS designation cards Considerations Assembling MLX TelephonesRemove or adjust the deskstand. See Figure 30. Adjusting or Removing the DeskstandConnect the line cords. See Figure 31. Connecting the Line CordsLabel the extension identification card Connect the handset33. Labeling the Extension Prepare the handset holder for wall-mounting 34. Removing the Handset HolderWall mounting an MLX-10, MIX-10DP, or MlX-10D telephone Replace the extension label and plastic cover37. Mounting the Backplate Label the button assignment card 38. Routing the Cord Through the BackplateMDC 9000 Cordless Telephone Installing Cordless or Cordless/Wireless TelephonesMDW 9000 Cordless/Wireless Telephones Adjust the contrast on the telephone% displayConnecting Telephones To the Control Unit Installing Telephones and Adjuncts Wiring a Telephone for Two Voice Pairs Even D8W Remove the wires or the patch cord from the connecting block Removing Damaged Connecting Blocks40. Removing the Connecting Block Page Connecting the Control Unit to Network Interface Network Interfaces Description Adapter WiringDid RJ21X Interface RJ21X Network Interface Connector RJ21X Wiring Field Hardware Building the Wiring FieldRJ21X 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 InterfacesRJ2GX Interface RJ48C/X Interface Testing TrunksTesting Loop-Start Trunks Testing Ground-Start Trunks Labeling Trunks Installing the Channel Service UnitAcculink CSUs Page 3150 Front Panel Page Connecting a PC to the Control Unit Installing the PC, CAT, or PrinterConnect the D8W cord Connecting a PC Within 50 FeetConnecting 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 Printer To the Control Unit Connecting a CAT To the Control Unit8Installing the PC, CAT, or Printer Connecting a CAT and Printer On the Same AC Outlet Connecting a CAT and Printer on the Same AC Outlet Connecting a CAT and Printer on a Different 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 On next AT&T 572 Printer Options Function Menu StatusBPS Function Menu StatusSwitch AT&T 475/476 Printer DIP Switch SettingsDIP 2-CM AT&T CAT Printer DIP Switch Settings Control SwitchPage Data Stations Connecting Data EquipmentStation For voice Data Station ConfigurationsTelephone GPA or Modem Data Stations 7500B Data Stations Analog Voice and Modem Data Stations GPA SettingsSetting Up Connect the GPA to the analog multiIine telephone Connect the modem to the GPAAnalog Voice and Modem Data Equipment Configuration Connect the modem to the control unit Modem Data-Only StationsModem Data-Only Equipment Configuration MLX Voice and Modem Data Stations Modem Data and MLX Voice Equipment ConfigurationConnect the MLX telephone to the control unit Connect the modem to the MFM in the MLX telephoneMLX Voice and 7500B Data Stations Connect the 7500B data module to the control unit MLX Voice and 7500B Data Equipment Configuration7500B Data-Only Stations B Data-Only Equipment Configuration Acculink 3150 CSU Video Conferencing Data StationsPage Video Conferencing Configuration Page B Data Module Settings Kbps 7500B Data Module and CSU SettingsInitializing the System Initializing and Testing SystemPerform a System Erase frigid start Programming GuidesRestoring from the Translation Memory Card Restoring from the System Programming DiskTesting MLX Telephones Setting the Time and DateTesting the System Page Press the unlabeled display buttons Testing MLX Display TelephonesTesting MLX Telephones with MFMs Hang up the handset to leave test modeTurn off the Message light Testing Telephones for Dial ToneTesting Telephones for Outside Dial Tone Hang upTesting Analog Multiline Single-Line Telephones Dial *03 followed by the trunk ID number 01 through Testing did TrunksTesting Incoming Automatic-Start Tie Trunks Testing Tie TrunksTesting Two-Way Automatic-Start Tie Trunks Testing Outgoing Automatic-Start Tie Trunks Verify that you have good two-way communication and hang up Testing Two-Way Dial-Repeating Tie TrunksTesting Incoming Dial-Repeating Tie Trunks Testing Outgoing Dial-Repeating Tie TrunksTesting Selected System Features Group Calling Test ARS and Smdr TestsCoverage Test System Speed Dial TestTesting Night Service Testing the DSSTesting the Paging System Testing the Dictation SystemHang up Repeat Steps 1 through 3 for all paging zones Testing Music On HoldMake an announcement into the handset Ground-Start Button Testing the Power Failure Transfer JacksIf 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 Control Unit Front Cover Installing the Front CoverInstalling Applications Voice Messaging Systems Touch-Tone Receivers Automated Document Delivery System Hardware Requirements Call Accounting SystemHardware and Software Requirements Page CAS Documentation Call Accounting Terminal8Installing Applications CAT Documentation Call Management SystemHardware and Software Requirements CMS Documentation Consideration ConversantConversant Intro Documentation Integrated SolutionHardware Requirements Installing Applications AT&T Attendant Merlin Mail Ports Required Number of Jacks Required Merlin MailConsiderations Hardware Requirements Merlin PFC Hybrid/PBX and Key Modes Behind Switch ModePassageWay 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 Replace the processor module. See Figure Install any expansion carriersInstall or replace any modules Upgrading the Control UnitRemove the housing clips from the right side of the module Replacing the Housing ClipsBeware 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 Install SPM Backup system programming Completing the UpgradeRemove the control unit housing Convert the backup fileIf applicable, program new features Install SPMProgram 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 Figure A-1. Form 2a, System Numbering Extension Jacks Form 2a, System Numbering Extension JacksPage Figure A-2. Form 2b, System Numbering Digital Adjuncts Form 2b, System Numbering Digital AdjunctsFigure A-3. Form 2c, System Numbering Line/Trunk Jacks Form 2c, System Numbering Line/Trunk JacksFigure A-4. Form 2d, System Numbering Special Renumbers Form 2d, System Numbering Special RenumbersUnit Load Calculation Worksheet Unit Load Worksheet Did Module Qty Unit Load = TotalUnit Load Hybrid/PBX or Modified = Total Square Network Access LinesQty Equipment TelephonesOptional 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 All Rights Reserved August Copyright 1994, AT&TContents 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 On next Typographical ConventionsProduct Safety Labels System operator Support Document No. TitleSystem Documents Telephone User SupportDocumentation for Qualified Technicians Document No TitleMiscellaneous User Support Feedback Form Equipment Maintenance TerminalTools 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 PCRemote Programming Maintenance Connect the PC and modem Setting Up Equipment for Remote MaintenancePress any key Using SPMStarting SPM With a Direct Local ConnectionDialing the System Operator When you hear the modem tone, hang upEnter the password With a Local or Remote Modem ConnectionDialing the Modem Directly Select an option Console Display/InstructionsSPM Display SPM DisplayConf Function of PC Keys in SPM Console SPM Function←Bksp Exiting SPM Preparation for Hardware MaintenanceRemoving the Control Unit Housing 16Introduction Disconnecting AC Power Disconnecting AC PowerMaintenance Strategy Maintenance StrategyAutomatic Tests AlarmsTrouble Reports System Restarts Clearing AlarmsCold Start Restart Warm StartFrigid 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 Control Unit Carrier Check the Power SupplyCheck the Processor Check the ModulesCheck 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 Error Logs, Access Logs, System InventorySummary Checking the Error LogsTransient/Permanent Error Thresholds Code Error Description More → More → Error LogSelect an error log option From the Maintenance menu, select the System optionSelect Error Log Console Display/Instructions Additional Information PC Checking Transient ErrorsInterpreting Error Codes Checking the Last 10 Errors000l Error Codes Action DescriptionStart Error Action Codes Description8Error Logs, Access Logs, and System Inventory Full Error Codes Description Action10Error Logs, Access Logs, and System Inventory 6COA DS1 PRI B-CH Group Inconsist 7404 Error Codes Descrption ActionNot in Standby Mode Miscellaneous Error On Hook Before Ready 840D Incorrect Firmware State Reviewing the Access Log Access LogScanning the Log Display the first screen of the Access LogMore System InventorySelect the Inventory option Reviewing the ScreenXx = slot number entered in Step Phantom ModulesTelephone Problems Troubleshooting Telephone Problems Symptom Section Fixing Telephone ProblemsGeneral Telephone and Wiring Problems Check the LEDs on the module If the LEDs do not light, retest the original telephone Analog Multiline Telephone ProblemsVoice Transmission Problems Move the T/P switch to its normal positionCall Forwarding Problems Single-Line Telephone ProblemsMLX 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 Backing Up System Programming Control Unit ProblemsChecking the LED Power Supply ProblemsChecking the Power Supply Checking the Interlocking Post Replacing the Ring Generator Power Supply Interlocking PostApp. Code PEC and Apparatus Codes for 012 Modules6Control Unit Problems Replacing a Ring Generator Replacing Auxiliary Power Units Replacing an Auxiliary Power Supply Power down the system Replacing the Power SupplyInsert a new power supply Peek Processor ProblemsSelect the Demand Test From the Maintenance menu, select the Slot optionSpecify Slot Dial a memory address Select the Peek optionContinue PokeSelect Continue Console Display/Instructions Additional InformationSelect Poke two times System Erase Frigid Start Select System Erase twice Select Yes Forced Installation of System SoftwareMenu →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 Restore system programming Error Conditions During Forced InstallationProcessor Problems Memory Card Is Corrupt Missing Card or Card Not Inserted CorrectlyMemory Card Is Wrong Type System Busy Other Error ConditionsPower Cycle During Installation Removal of Memory Card During InstallationPressing 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 Tests Module ProblemsModule Test Process Module Test ProcessTest Notes Busy-Out/ResetPower supply System ComponentsFor 100D modules, continue with the CSU Ioopback test Busy-out or reset the moduleRun the internal Ioopback test Run the board controller testBusy-Out and Reset Persistent Module ProblemsSpecify the slot number n=00 to Busy-Out SummarySelect Busy-Out Console DispIay/InstructionsConsole Display/Instructions Additional Information P C Reset SummarySpecify the slot number nn = 00 to Select ResetRestore Specify the slot number n= 00 to Enter →Restore →YesSelect the Restore option Internal Loopback Test Menu →Maintenance →Slot Select Internal Loopback Test Specify the slot number nn = 00 toSelect Demand Test Screen below smearsI Interpreting Test ResultsSlot empty or not valid Restoring the ModuleBoard Controller Test Select the Board Controller Test Board aaaaaaaaaaaaaaaaa Select Test Once or RepetitiveChannel 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 Replacing Modules Channel Loopback Errors Error Messages Corrective ActionTo replace a module, follow the steps below Checking Unlabeled Wiring Upgrading Circuit Module Firmware Summary Inserting the Upgrade Memory Card Specify the slot number nn =00 to Select UpgradeModule Problems Screens below appear during the procedure Observe the status screen below Memory Card In Use By Another Feature Error Conditions During Firmware UpgradeModule Cannot Be Upgraded Select Exit and reinitiate the upgrade procedure Module ErrorXx = slot selected in Step Memory Card File ErrorFlash ROM Fails to Erase Board Memory Programming Failure 100D Module ProblemsUpgrade Attempted on an Empty Slot CSU Loopback Test Error EventsBusy-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 Select the CSU Loopback Test Specify the 2-digit slot number Nn = 00 toScreen 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 Enter →Clock →Exit 100D Module Clock StatusSelect Clock From the Maintenance menu, select. the Slot optionUnplug the control unit from the AC outlet Carrier ProblemsRemoving the Faulty Carrier System Status Checking System and Slot StatusReplacing the Carrier Select Status Green LED Interpreting the System Status ScreenRed LED Yellow LED→Enter →Status Slot StatusF10 Select the Status optionLED Checking System and Slot Status 92Control Unit Problems Troubleshooting Trunk Problems Trunk ErrorsTroubleshooting Trunk Symptoms Section Manual Correction of Trunk ProblemsIf the module continues to malfunction, replace it Outgoing Trunk ProblemsCheck for outside dial tone at the network interface Place an incoming call through the troubled trunk Incoming Trunk ProblemsTesting Trunks Automatically Maintenance-Busy StatusMaintenance-Busy Causes Permanent ErrorsTieTrunk Maintenance-Busy ProgrammingGround-Start GS Trunk Loop-Start LS TrunkChecking Ports Checking Trunk Maintenance-Busy Status SummarySelect the Line/Trunk Option From the Maintenance menu, select the Port optionNext trunk Checking Extension Maintenance-Busy Status SummarySelect trunk Status Xxx = line number entered in Step Select Next to see the statusSelect 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 → F1 → F3 Resetting an RS-232 PortConsole Procedure PC ProcedureSpecify 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 Lines Summary Auditing DS1 PRI B-ChannelsSelect the B-Channel option Select Audit Line Auditing Calls Summary Select Audit Call Installing the Control Unit Housing Release 2.1 or Later Conclusion of Hardware MaintenanceTo 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 Assemble the control unit housing. See Figure Installing the Control Unit Housing Release 2.0 or EarlierAssembling the Control Unit Housing Release 2.0 and Earlier Installing the Control Unit Housing Release 2.0 and Earlier Support Telephone Number Customer Support InformationCustomer 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 Limitation of Liability Voice Mail SystemsPage 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 Figure D-2. Inserting the Memory Card Inserting the CardUnformatted Card Memory Card FormattingFormat 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 Summary Automatic Backup Automatic BackupSelect Auto Backup Procedure Automatic BackupSelect Off Make a selectionErase the current daily backup time Daily Backup ProcedureErase the current weekly backup day and time Backup Messages= backup filename Backup CanceledCard Removed While Backup Is in Progress Card Is Write-Protected Card Missing or Card Not Inserted CorrectlyCard Failure Summary Restore Select Restore Procedure RestoreObserve the restore progress screen Select the restore fileObserve the restore file validation screen Card Missing or Card Not Inserted Correctly Restore MessagesWrong System Programming Port Card Removed after ConfirmationCard Failure after Confirmation Release MismatchBoard Mismatch Wrong Type of CardStrap in Place for Key Mode but Mode is Set To Hybrid Release 2.1 and Earlier Modifying a Release 2.1 or Earlier Processor for Key ModeFigure 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 ALS AddsAscap AMIANI ARSAT&T Attendant AT&T Switched Network Audix Voice PowerAsynchronous data TransmissionB8ZS BIS Board assignment Board renumbering Bus Button Byte CCS CASCAT CMS CSU CORCRC DHG DCEDFT Did DS0 DLCDnis DOSEIA DSS DTEESS ESFFCC GPA Frame Framing format frequency generatorFRL General-Purpose Adap See GPA GlareIclid HfaiHFU II/III Jack Kbps Key modeIsdn Isdn 7500B Data ModuleLED LANLDN Loop-start trunk AccessLocal loop Logical IDMLX-10DP MFMMLX-10 or MLX-10D telephone Glossary OPX OPTPBX PRI PFTRAM QCCSID ROMSAA SDNSmdr Simplex signalingSingle-line telephone SlotSystem date System acceptance test System Access buttonsProgramming Maintenance Supplemental Alert See SAA AdapterTTR TDMVMI UPSVAC VDCMaintenance and Troubleshooting IN-1 IN-2Maintenance and Troubleshooting Maintenance and Troubleshooting IN-3 IN-4Maintenance and Troubleshooting Maintenance and Troubleshooting IN-5 Index