Digital Telephone Interface Board (Dtib) - Vodavi Starplus Triad 1/2/3 Installation Manual

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Digital Telephone Interface Board (DTIB)

This board provides the interface to twelve (12) digital telephones. The
card has two LEDs (one for the DTIB board, the other for the DTIBE (DT24)
board) to indicate off-hook/in use status. The DTIB can be installed or
removed under system power. The card extractors are color coded green.
There is one 50-pin female amphenol connectors labeled CONN3 located
on the front of the card. This allows the system to be cabled to the main
distribution frame (MDF). 25-pair telephone cabling must be prepared
with mating connectors to extend the inter-face circuits to the MDF. The
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. It is recommended that
66M1-50 split blocks with bridging clips be used to simplify
troubleshooting and to quickly isolate faults.
The Digital Telephone Interface Board Expansion (DTIBE) (DT24) utilizes
the other LED on the DTIB board to indicate off-hook/in use status. This
PCB is installed onto a DTIB board in a daughter board type arrangement
to provide an additional twelve (12) digital phones.
A compatibility issue exists between certain DTIB and DTIB-E boards,
which could result in noise on stations connected to particular Issue 2
DTIB-E boards.
The boards affected can be identified by the Issue level, which is
silkscreened on the boards. VTI has released Issue 1 DTIB and Issue 1
DTIB-E boards, as well as Issue 2 DTIB and Issue 2 DTIB-E boards.
The compatibility issue may surface when an Issue 2 DTIB-E is installed on
an Issue 1 DTIB. Configure DTIB/DTIB-E cards according to the table to
avoid this compatibility issue.
Issue 1 DTIB-E
Issue 1 DTIB
Issue 2 DTIB
Issue 2 DTIB-E
Compatible Not Compatible
Compatible
Station Connections
Compatible