Ericsson LBI-39076B Maintenance, GTI Removal, Mastr II or IIe Repeaters, Mastr III Repeaters

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MAINTENANCE

LBI-39076B

MAINTENANCE

GTI REMOVAL

When you are about to remove a GTI from an EDACS Repeater cabinet in a working system, you must take special care to avoid disrupting the system. There are two recommended procedures: one procedure for when the GTI is connected to a MASTR II or IIe EDACS Repeater, and the other procedure for when the GTI is connected to a MASTR III EDACS Repeater.

If you are upgrading the software in the GTIs, see the Software Replacement heading in the Maintenance section of this manual.

MASTR II or IIe Repeaters

Use the following procedure to disconnect a GTI from a MASTR II or IIe EDACS Repeater. (An alternative to using the jumper in step 3, is to disable the radio channel through the System Manager (RF parameter in screen 20, panel 1:5). However, this reduces the number of available radio channels by one and therefore should only be used for a very short period of time, if at all.)

1.Disable the Interconnect parameter through the System Manager (screen 10, panel 1) for the specific channel number associated with the GTI being removed.

2.Disable the Line Active parameter through the System Manager (screen 14) for the specific channel number associated with the GTI being removed.

3.Add a jumper between pins 2 and 3 of the Power/Audio plug on the back panel of the GTI (see Figure 45).

 

 

Back Panel of GTI

 

 

 

 

 

Temporary Jumper

1

2

3

4

5

6

 

 

 

 

 

Power/Audio

 

 

 

 

 

Plug

Figure 45 - Position of Temporary Jumper

4.Disconnect the Power/Audio plug from the back panel of the GTI (you will need a pair of pliers to pull the plug out of the recessed connector).

5.Disconnect the Phone plug from the back panel of the GTI.

6.(Master GTI only) Disconnect the two Site Controller data link plugs from the back panel of the Master GTI.

7.Disconnect the PCM Data Bus from the back panel of the GTI. If there are two cables (or one cable and a termination) quickly reconnect the two cables (or the cable and the termination) back together without the GTI and let hang).

NOTE

It is necessary to temporarily separate the two PCM Data Bus cables when disconnecting them

from a GTI. While separated, all GTIs connected to higher numbered radio channels will not be connected to the Master GTI and may cause interconnect abnormalities such as dropped calls and/or alarms.

Use the preceding procedure in reverse to reconnect the GTI to the MASTR II or IIe EDACS Repeater. Don’t forget to remove the jumper between pins 2 and 3 on the Power/Audio plug after plugging it into the GTI.

MASTR III Repeaters

Use the following procedure to disconnect a GTI from a MASTR III EDACS Repeater. (No jumper is needed.)

1.Disable the Interconnect parameter through the System Manager (screen 10, panel 1) for the specific channel number associated with the GTI being removed.

2.Disable the Line Active parameter through the System Manager (screen 14) for the specific channel number associated with the GTI being removed.

3.Disconnect the Power/Audio plug from the back panel of the GTI (you will need a pair of pliers to pull the plug out of the recessed connector).

4.Disconnect the Phone plug from the back of the GTI.

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Contents System Manual Revision Date Reason for Change Revision HistoryTable of Contents Table of Contents List of Figures and Tables FiguresFigures and Tables Regulatory Compliance DOC Compliance Notice DOC RegistrationDOC Avis DE Conformation Specifications SpecificationsMastr Overview Introduction / DescriptionGTI Units DescriptionIAM Description / InstallationGTI Configurator Software GTI Interface BoardGetc InstallationMDR GTIEmpty Radio SoftwareSite Controller Hardware Site Controller SoftwareApplication Software PROMs Radio Channel AssignmentsPersonality PROMs Main Board GTI SoftwareRevision-A Main boards Processor Board Revision-D or E Main boardsInterface Board OUT GTI Telephone InterfaceRevision-A Main Board F2&F3Wire E&M, Type Wire E&M, MicrowaveEnd-to-End, Loop Start End-to-End, Ground Start Jumper Positions for JP1 Through JP15 Fuses External JP4 Lead Fuse F2 Reference DS1 Revision-D or E Main Board GTI DIP Switch SettingsDid GTI Interface Board Mounting GTI Connections GTI & IAM MountingTelephone Line Mastr II or IIe Power Supply/Audio Mastr III Power Supply/AudioPCM/Data Bus Site Controller Computer IAM SoftwarePrinter RS-232 Port Power SupplyAlarm Outputs IAM ConnectionsGetc Modification IAM DIP Switch SettingsOperation without System Manager ConfigurationSite Controller Database Interconnect Timing ParametersGeneral Limits for Site Operation with System ManagerWho Can Receive Calls Who Has What Toll Call Restrictions Who Has What PriorityGTI Database RecommendationRTS CTS Remote Data LinkOperation Printer Indicator CDR Received IndicatorAlarm Indicator Low-Battery IndicatorOverview BackupInterconnect Calls StatusDetecting the Call Telephone-Originated CallAnswering the Call Obtaining Working Channel Identifying Called IDRadio-Originated Call Ending the CallObtaining a Working Channel RE-DIALED Digits Interconnect DigitsOverdialed Digits Mastr III Repeaters MaintenanceGTI Removal Mastr II or IIe RepeatersGTI DSP ELI Software UpgradesPlan a All at One Time Software Version Required for Main Board Revision NumberPlan B Half at a Time Maintenance Plan C One at a Time Maintenance IAM Unit No interconnect or radio-to-radio TroubleshootingSet the Max # Concurrent Intercon Interconnect Rotary Definition forAll telephone-originated interconnect Toll Call Parameters screen LBI-39076B Glossary GlossaryPresence of a DC loop current between one of the two wires Parts List Glossary / Parts ListEdacs Interconnection DiagramSchematic Diagram Installation Checklist Installation Checklist
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