Vodavi XTS-IP Installation Manual page 22

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Chapter 1 - Introduction
T1 Interface Board
The T-1 Interface Board (T1IB) provides the T-1 (1.544Mbps, 24-Voice Channel) digital interface
circuit, control circuitry, and synchronous clock control circuits. DTMF tone detection units can
be installed optionally on the T1IB. The T1IB has 8 LEDs on the front edge of the PCB which
indicates errors of T-1 line, in-use status, and synchronous clock enable status.
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Add-on Boards: DTRU4
Primary Rate Interface Board
The Primary Rate Interface Board (PRIB) provides one Primary Rate Interface circuit. Each circuit
contains 23 bearer and one data channel (23B+D). When a PRIB card is programmed into the
system, the system interprets all B channels as trunks. Thus, one PRIB which contains 23B+D
circuits provides 23 line appearances to the system. The PRIB card uses 24 time slots when
installed.
The PRIB must usually be used in conjunction with a Channel Service Unit (CSU). Connection is
made via a DB15 from the PRIB to the CSU. When networking systems that are less than 50 feet
apart, no CSU is required.
The PRIB accepts two DTRU4 boards.
When ordering PRI lines from the telephone company, specify ESF framing and B8ZS line
coding. PRI only supports National ISDN 2 (NI-2). No other standards are supported.
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Add-on Boards: DTRU4
Basic Rate Interface Board
The Basic Rate Interface Board (BRIB) interface provides four Basic Rate Interface circuits. Each
circuit is comprised of two bearer (64Kbps each) and one data (16Kbps) channels (2B+D). When
a BRIB is programmed into the system, the system interprets all B channels as trunks. Thus, one
BRIB which contains four 2B+D circuits provides eight line appearances to the system. A
maximum of seven BRIBs can be installed into the system (56 B channels).
The BRIB uses the U interface of the BRI standard. Connection to the network is made via RJ45
connectors on the front edge of the board. No CSU is required to connect to the central office.
The BRIB card uses eight time slots when installed.
When ordering BRI lines from the telephone company, specify Capability P as the ordering
code. National ISDN 1 (NI-1) is supported. No other standards are supported.
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Add-on Boards: DTRU4
XTS-IP - Installation Manual
Product Description
December 2005