BT BT Versatility manual System Isdn settings, T0 interface termination, S0 interface termination

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BT Versatility

Installation and Maintenance Manual

System ISDN settings

The system can be configured with 8 Basic Rate ISDN interfaces. Half of these can be configured for internal S-bus operation.

The second interface on the CCU and each of the Ports Modules can be programmed as S-bus interfaces for ISDN to-the-desk.

T0 interface termination

An ISDN bus must be terminated twice, once at the start and once at the end of the bus. The Network Terminating Equipment (NTE) will provide the termination at the start of the bus. The end termination is also provided by the NTE if the BT Versatility is directly connected to one of the NTE RJ45 sockets.

If ISDN 2 extension cabling and sockets are provided between the NTE and the switch the end terminating resistor will normally be provided by an ISDN type 2 RJ45 line jack.

In both of these cases BT Versatility T0 interface does not require the terminating resistor to be connected and the associated switches in the MDF associated with the T0 interface must be set to OFF (Default).

NOTE: In the case of structured cabling if no end termination is provided, the associated switches in the MDF associated with the T0 interface must be set to ON.

S0 interface termination

An ISDN S-bus must be terminated twice, once at the start and once at the end of the bus. The BT Versatility S0 interface emulates the Network Terminating Equipment (NTE) and consequently is always terminated with 100 ohm resistance. In this case the switches associated with the interface in the MDF must be set ON.

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Contents BT Versatility Contents Introduction General overviewLightning and surge voltage protection Safety Precautions during installation and system upgradesElectrostatic precaution ESP BT Versatility Pro. PlusIncludes System, VM, 1M,2V8 Maintenance items Installation checklist Installing the Central Control Unit CCU LocationCCUMounting the CCU Wall mount bracketCCU Bracket + Backplane Bracket CCU Mounting bracket clearancesCCU Mounting Bracket 300mm min Modules located in the CCU Module locationMounting the CCU with two brackets Installing the Backplane wall bracketSystem Expansion Mounting the Backplane Mounting screw holeExpansion Modules Installing an Expansion module Push up to lockInstalling the Analogue Module in the CCU Analogue line moduleAnalogue Module Remove the cover Locate the Module First network moduleTo Locate the Analogue Module in the Ports Module Digital Line Module Isdn First network module Installing the Basic Rate Isdn Module in the CCUBasic Rate Isdn expansion module To Locate the Digital Line Module Isdn 2 in the Ports module Second Module. Can be external T or internal SS0 interface termination System Isdn settingsT0 interface termination Voicemail module Back up Voice Module voice messages and GreetingsPrimary Rate Interface Availability TBC Connecting the battery backup unit to the system Battery charger connector on the PSUConnecting the Battery Led IndicatorsFeaturephone V16 Featurephone connections underside of phoneV8 Featurephone connections underside of phone Attaching the Featurephone desk plinth V8 Position at 35 degreesFeature phone with console To connect the V16 Console to a Featurephone V16 onlyV16 expansion console Expansion consoleClip, Plinth and installation of the V16 expansion console Wall-mounting a Featurephone Line cord railsWall hook when the V8/V16 is wall mounted Door IntercomCabling Break outs Connecting the extensionsCabling the unit Speech Pin Data Door Intercom Doorstrike Connecting a MOH Music On Hold ModuleCCU connections Connecting a PA public Address amplifier Connecting a PC or Printer to the Serial PortPorts Module MDF Connections MOH Module containsInternet Module MDF Connections Options Module MDF Connections Central BellExternal Extension Cable limitationsExpanding an Existing system Installing an additional Network Analogue or Isdn moduleInstalling additional modules Maintenance procedures Hot Swapping faulty modulesReplacing a faulty Module MDF Replacing Faulty PCBs Replacing the 008 extension boardReplacing the CCU Control PCB Power supply unit spare fuse Replacing the Power Supply Unit Spare FuseReplacing the CCU MDF Line position Power failAnalogue Commissioning Power up and testSwitch on Incoming ringing ProgrammingEquipped exchange lines Call Barring Installation Wizard Internet Module ProgrammingAdsl Isdn Recommendations for customer training Troubleshooting Technical specification 230 ± 10% V 50 HzLAN Full remote support from a BT Maintenance Centre Index Offices Worldwide