Vodavi STARPLUS Triad XTS, Installation Manual

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3-56 Station Connections
Chapter 3 - System Installation
Digital Telephone Interface Board
The Digital Telephone Interface Board (DTIB) provides digital voice and data communications
to/from digital telephones.
An industry standard RJ21 type female connector is mounted on the front edge of the PCB for
connection to the station interfaces.
The DTIB12 and DTIB24 boards provide the interface to 12 and 24 digital telephones
respectively. The card has one LED to indicate off-hook/in use status. The DTIB card extractors
are color coded green.
Cables
There is one 50-pin female amphenol connector labeled CN2 located on the front of the card.
This allows the system to be cabled to the main distribution frame (MDF).
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25-pair telephone cabling must be prepared with mating connectors to extend the
interface circuits to the MDF.
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Cables should be routed through the cable clamps at the bottom of the KSU to the MDF.
These cables are then terminated on industry standard 66M1-50 type punchdown
connector blocks.
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It is recommended that 66M1-50 split blocks with bridging clips be used to simplify
troubleshooting and to quickly isolate faults.
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LED1 shows status of the board (ON = in use, OFF = Idle).