AT&T 518-600-016 manual Theory of Operation

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●Unprotected mode: Must be used for the E&M

Type 1 Standard interface in order to meet voltage drop criteria for the interface. This mode is used when there is a network interface.

●Protected mode: Resistance is added in tie M lead to provide additional protection from foreign voltages and transients. This mode is used on local tie lines, such as between systems in different buildings.

●Simplex mode: The signaling leads are superimposed onto the analog transmission leads to provide a two- pair interface. Resistance is included in the signaling leads for protection from foreign voltages and transients. This mode is used primarily with E&M Type 5 signaling on local tie lines.

Signaling Type Signaling type designates the logical signaling used. There are the following three options:

●Type 1 Standard (default): The M leads are used for signaling from PBX to line. Off-hook is -48 VDC and on-hook is local ground. Signaling in the other direction uses local ground for off-hook and open for on-hook.

●Type 1 Compatible: This interface is back-to-back compatible with Type 1 Standard. It allows direct connection between systems where no intermediate signaling equipment is used.

●Type 5: A symmetrical 2-wire arrangement that signals in both directions by means of open for on-hook and ground for off-hook. The primary application of Type- 5 interface is local tie lincs.

1-48 Theory of Operation

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Contents Merlin 1990 AT&T Issue All Rights Reserved January System Hardware System DescriptionWhats in This Manual System Overview System OverviewMerlin II system configuration System Overview Data feature Size, type, and features of a Merlin II system areDetermined using system planning forms For administration purposesSystem Overview A Merlin II system behind-switch operation System Overview System Overview System Overview System Overview Merlin II Attendant operation System Overview FM1 FM1 FM2 FM2 FM1 FM2 FM1 FM2 FM1 FM2 FM1 FM2 System Hardware Control unit components Control unit components System Hardware System Hardware System Hardware Module controls and indicators Module controls and indicators Green = test condition Amber = busy Red = standby mode System Hardware System Hardware A selection of analog voice terminals System Hardware Basic Operation of Voice Terminals System Hardware Calls Accessories described hereAlerter Accessories. Devices such as a horn, bell Alert Adapter so that people working in noisy orA selection of Merlin II system accessories System Hardware Basic Telephone and Modem Interface 2 BTMI-2 System Hardware System Hardware Theory of Operation System architecture Theory of Operation Theory of Operation Theory of Operation Analog to Digital Signal Processing PCM uses PAM as its starting point but goes further Mu-Law 150 … External paging interface Module slots Board signatures Time slots 256108 Music-on-Hold interfaceSignaling 11 E&M signaling Tie Line Parameters Theory of Operation Theory of Operation 20 to 4800 ms increments of 20 ms Ms default Local140 to 2400 ms increments of 10 ms Same Site Simplex System Or Inter Type Building Signaling ProtectedMode Location TypeStandard Unit Network Far EndMerlin II System Other Inter Protected Requires a Building Type ProtectionSystem Connectivity System ConnectivityMerlin II System Control unit Modem Pools Merlin II System Merlin II System control unit D8W cord Modem pool General Requirements for Modems System Connectivity MUSIC-ON-HOLD External Loudspeaker Paging 4PT 5PR System Connectivity Preinstallation Requirements InstallationInstalling the Control Unit Modifying the System Preinstallation Requirements Without dc voltages being affected Specification for an ac line voltage low of 99 VACOther splices, and should meet these specifications Max. current amperes per power supplyMax. power use watts per power supply Installed at the control unit location, additionalMounting surface Hardware required System Grounding Requirements Merlin II System control unit Central Office Check the ac outlet for proper ground with a circuit tester CO Line Protector Surge Protectors Static Discharge Problems Solutions to Radio- Frequency Interference Problems System Grounding Requirements Typical Merlin II System Wiring Wiring the SystemMerlin II System control unit Function as follows Are for basic telephones only. In case of a powerThere are various types of jacks on the line and station Modules -3.Each type of jack has a specificLine and station module jacks Wiring the System 012 Outside Line Wiring Network interface adapters Wiring the System Testing the Outside Lines To number all the line jacks on the modules themselves Wiring the System Tie Line Module wiring Wiring the System Voice Terminal Wiring Pair modular jumper cords. These cords are for Connecting Voice Terminal Wiring Directly Wiring the System Wiring a Voice Terminal for TWO VOICE-PAIRS PFT O O O O O O R T R T R T Standard 4-PAIR Wiring Brand Rex BR866-JC Wiring the System Jack Field Wiring Wiring the System Constructing a Jack Field for Voice Terminal Wiring Wiring the System Topics Shop Wiring the System Wiring the System Wiring the System Wiring the System Labeling Jacks and Boxes Wiring the System 62400 Net Intf Adptr 267C Adapter 2A Adapter MountingZ601A Adapter Z610A AdapterBlack GND Yellow V2T Brown V2R Slate BR-W 48VGreen RED Black CO Line Wiring From Merlin 10and are listed below Basic Carrier AssemblyFeature Module Required components of a MerlinInstalling the Control Unit Mounting the Basic Carrier Mounting surface 18Backboard Installing the Control Unit 12 Mounting the basic carrier Installing the Control Unit When the carriers are completely engaged, tighten the screws Determining Unit Load Requirements Installing the Control Unit BIS-10 voice terminal 2x9 Button 1x8 Button Hfai 1X5 Digital 1X4Install modules on the carrier from left to right Power Supply Module in the leftmost slotProcessor Module before installing Leftmost slot must contain the Power Supply ModuleModule Installation Installing a Module Removing a Module Page Installing the Power Supply Module Installing a Frequency Generator Power Supply Module Installing the Control Unit Transformer Installing the Control Unit Installing the Control Unit Installing the Auxiliary Power Unit 19 Connecting the Auxiliary Power Unit to the control unit Installing the Control Unit Feature module Processor module Installing the Control Unit Bottom header AA Do not touch Modifying the 517B7 Processor Module for Square Key Line 400 with Dtmf Module Line 800 Module Installing a Tie Line Module If you are installing a Basic Telephone Module, you also Installing the Control Unit D R port Modular Z200A R d 1200 LQ or NLQ144 B1-DIR.1DIP1-Open DIP2-Closed DIP2-Open DIP3-Open DIP4-Open Installing the Control Unit Installing the Control Unit Installing the Control Unit ADU Power to the System To Turn the Power Off Normal Operation Connecting the Voice Terminals Assembling the Voice Terminals Page Back to the center position Slide the T/P switch to the center positionLift the handset Touch one or more dial pad buttonsHang up the handset Connecting the Power Failure Telephone Page Have that person call the number after you hang up Lift the handset on the Touch-Tone or rotary dial TelephonePick up the handset Using for the testTesting Intercom Calls Testing lntercom Ring Testing the System Planning Form for Feature Modules 1 Testing TIE Lines You hear ringing Number of the voice terminal at which you are waiting Completing the Installation27 Control unit covers Testing the System Installing the Top Cover 28 Installing the control unit top cover Testing the System Installing the Front Cover Front cover P t y module Modifying the System Adding a Voice Terminal Modifying the System Moving a Voice Terminal Modifying the System Adding Accessories Heavy machinery areas and quiet zones e.g Ringing in noisy or large working environment.31 a General Purpose Adapter Adding Accessories To the Other jack on the voice terminal Hands-Free Unit HFU is a speakerphone that allows33 a headset with Headset Adapter Adding Accessories Power Accessories Adding Accessories Basic Telephone and Modem Interface 34 a Basic telephone and Modem Interface Adding Accessories Instructions on proper installation. See System With power lines, and power currents induced by nearbyPower lines, Irob protectors are required. Two TII Leaves the building, and place the other where the cable35Grounding protection for Irob telephones Extender is not available. It is scheduled to be Available for Feature Module 1, Feature Module 2,Remote location by using the Off-Premises Telephone LineJack Voice Terminal Power Supply Unit Upgrading an Existing System Systems Feature Module 1 =32 Feature Module 2 = Release 3 =With a Display Console With a BIS-34D Console 34 Upgrading an Existing System Upgrading an ExistingSystem Upgrade Instructions FMI to FM2 Directly to the appropriate jacks on the line modules Considerations Dial Plan Printout AdministrationAdministering an Upgraded System Centralized Programming Features that can Affect Calling PatternsModules Basic Telephones Connected to Telephone Interface DevicesAdministrator/Attendant Console 2The Administrator/Attendant Console Page Administration codes on the dial pad, then pressing line Cannot be used to administer the MerlinAdministration method provided in this section under Administering Features a BIS-34 ConsoleA BIS-34D Console Administrator/Attendant Console Assigning Intercom Numbers Display Console Shift Buttons Contains that voice terminal’s intercom number. If Display Console Station Shift ButtonsShift Must be on next to the shift button for the group thatDisplay on the Display Console Administration Menu for Merlin II System, Release Page Information Current administration modeVoice terminal can’t be administered Current feature being administeredBefore Administering a System Both the Merlin II System Display Console Features from the attendant console using Functions in administration mode, you should place aWant to record the administration function labels in a Programmable features, be sure to assignAre the following Administration port. Station port 01 intercomThrough 32 for Feature Module 1 and assigned Identifying numbers 801 through 856 for FeatureOn-Line Module Swap Port. Station port 19 is Inward Dial Plan Numbers. Four digits through Set system operating conditions Set options Before Administering a System Administering a New System Press Small for a small system or Large for a large SystemDial #201 For a behind switch system, press More Dial number to designate system size = small = largeARS As an attendant position, and this cannot be changed Dial #202Press Store Press MessagePress # This feature can be administered only from a MerlinAdministering a New System Press More, More, Print, DialPlan LNITIALIZING Press Lines, or Sations to select the screen for Go to of Block Renumbering or SingleBelow Stations or linesDial the first lowest-numbered new Flexible Number dial code Dial the new Flexible Number code Press Enter If your system is pooled, follow this procedure. If your Administering LinesAdministering a New System 5Press Lines, pools Press the line buttons until your selection is shown Press Adm PoolDial #302 Press line buttons for the selection you want Administering StationsPress the Auto Intercom button or dial the code for Station With a Display ConsolePress Adm Tel Press Adm TelPress Station, DialAcc Number of the station you are copying to Identifying Analog Voice Terminal Type Press Auto Intercom button until your selection is shown Dial #320To the center position Planning.Form for Feature Module 2. The form showsDial #210 Follow the appropriate procedure below to identify Setting OptionsPress the line button until your selection is shown Press Message Dial #204Dial #205 Following codesTerminal cannot have both features Administering DataAssign voice/data pairs by pressing the appropriate Dial #211Press either one of two adjacent Auto Intercom buttons Administering Tie Lines Setting tie line module DIP switches Administering a New System Port Options Switch Position Line, then press Enter Line type outgoing Signal typeDirection 300 ms Four digits, 4010 through 4097 Wink startPress More, More, More, TieLines, InType Repeat steps 4 and 5 for each tie line port Touch the tie line button to select the dial tone Press the tie line button to select the dialing mode. wantedRepeat steps 4 through 7 for each tie line port Press Drop remove the old setting SettingPress Drop to remove the old setting Switch to the center position Press Exit if you do not want to change the setting. o rPress Single Dial the first lowest numbered new dial code Press Enter Press BlockVoice Announcement Call Restrictions Administering an Upgraded SystemAdministering a Changed System Dial #299 From the administration menu, press System, MorePlanning forms Press Small or Large for the system size wantedDial number to designate system size 0 = small = large Enter administration mode by sliding the T/P switch to P Dial the appropriate number = square With a BIS-34D.ConsoleWith a Display Console Dial #203 Press StorePress More, Options, More, More, ModSwap Optional Features Features Compatibility Table A t u r e Quick Reference Administering Features from a Display Console Allowed Lists Press Dial table number O through Press D r o p Press Conference to Call Report To administer Copy from Use Backspace Disallowed Lists To create Dial the list number 0 through Group Call Distribution To assign lines Hold Disconnect Steady green light on = phone in group Night Service Enhanced To set up an To suspend Night Service with Time Set To get a One-Touch Call Handling To set system Drop Press Backspace or Drop to remove current entry Optional Features Administering Features from a BIS-34D Console Message ARS ARS To associate an Press the fixed button Conference, Transfer, or Drop Press Speaker Tel Press Conference To set up Disa outward Forced Account Code Entry Group Paging To assign phones to Press Message Night Service, Enhanced To assign phones to Touch Drop to remove entry Night Service, Enhanced To suspend Night Service Reminder Service Cancel Press Conference twice Transfer Return Administering Basic Telephones Administering Basic Telephones Basic Telephones Connected to Telephone Interface Devices Administering Basic Telephones Programming Voice Terminals Dial *347 for Immediate Ring Dial *36 for Delayed RingDial *346 for Delayed Ring Dial *37 for Immediate RingDial 37 for immediate ring Dial 36 for delayed ringCall Pickup Automatic Line Selection To program a pause, press Hold To program a stop, press Drop Programming Voice Terminals Programming Voice Terminals Testing Tie Lines TroubleshootingReaming the Control Unit Testing Outside Lines Basic Troubleshooting Procedures Components Basic Troubleshooting Procedures For Release General Operating Conditions Basic Troubleshooting Procedures Touch Conference twice On-Line Module SwapIntercom button Remove the controller station port designationTouch a programmable button Touching Intercom Ring Exit the procedure byTie Line Troubleshooting Tie Line Troubleshooting Tie Line Troubleshooting Tie Line Troubleshooting Tie Line Jack Pin Identification G n a l Pin No Try another tie line port, then retest the condition Select the next tie line for testing Testing Type 1 Compatible Tie Lines Tie Line Troubleshooting If you do not hear dial tone, go on to step Tie Line Troubleshooting Tie Line Troubleshooting Readminister port 1 for Type 1 Compatible Assign the tie lines to two stations, called station a899 Tie Line Troubleshooting Cross-connect field for Type 5 Simplex Tie Line Troubleshooting If the condition has not been corrected, go on to c Replace the Tie Line Module, then retest the condition Line Troubleshooting Procedures for Specific Symptoms Difficult to Place C a L LS Faulty Merlin II system Possible Cause Possible Solution To Investigate Further Caller Cant Hear Person Answering Hear the caller Symptom Calls waiting on hold are frequently disconnected Calls are CUT OFF or Dropped Symptom a voice terminal doesn‘t ring Intercom Ring Phone Constantly Rings Digital set with data stand Cause Possible Solution To Investigate Further Possible Cause Possible Solution To lnvestigate Further Faulty cable connection Symptom All voice terminals are without lights or dial tone Line Button Light Shows False Status BIS-34 Lights Dont O F F Symptom a feature programmed on a voice terminal doesnt work Symptom a module doesnt work properly in a slot Dirty Changed Recall Button Doesntwork C a L L S C O N N E C T S Line When Behind Switch System Looses ITS Memory DUE to a Power Failure On a BIS-34D Display Console, touch Message and dial #200 General TestsHardware Restart General Tests Product Listing Ordering Information Ordering InformationProduct Listing 5 4 7 6 4 5 Products Voice Terminals and Accessories Apparatus Desk Stands and Wall Mounts Button Label Sheets FM2 & R3 only CHM-CH-BT2-B-1 Basic telephone jacks. See Jacks IndexConsole Illus Grounding Systems, 3-36 Processor, installing feature module on, 2-73 Power supply units, auxiliary, 2-122- 2-123Printer Stations Wiring. See also Voice terminal wiring jack field, 2-33