STARPLUS Triad 1, Product Description Manual

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Peripheral Boards 10-13
Chapter 10 - Triad 1/2 System Configuration
Primary Rate Interface Board (PRIB)
This interface 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
Triad 1/2 system, the
system interprets all B channels as trunks. Thus, one PRIB which contains 23B+D circuits
provides 23 line appearances to the
Triad 1/2 system. A maximum of two PRIB boards may be
installed into the system. The PRIB card uses 24 time slots when installed.
The PRIB must be used in conjunction with a Channel Service Unit (CSU). Connection is made
via a DB15 from the PRIB to the CSU.
The PRIB accepts two DTMF-A 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.
Figure 10-9: PRIB (Primary Rate Interface Board)
Vodavi has successfully integrated its PRI ISDN with the Lucent 5 ESS, Siemens,
Stromburg Carlson, and the DMS100 Central Offices. Vodavi ISDN should work with
all Central Office switches, but this has not been verified. Therefore, some delays in
service may be experienced.