iPECS-MG
Hardware Description and Installation Manual Issue 1.1
51
5.3.4 T1-PRIB (Primary Rate Interface Board)
There are two kinds of PRIB according to CPU, but they have the same functions.
The T1 and Primary Rate Interface (PRI) board interfaces to North American standards based
digital networks. Standard alarms are provided by on-board LEDs (refer to chart below). The
PRIB includes the T1-PRI interface, control and synchronous clock circuitry as well as standard
alarm indications using front panel LEDs (refer to LED Indications chart below.
The board is switch-selectable (SW1) for T1 or PRI operation both operating with a 125 usec
frame at 1.544Mb/s. In T1 operation, the standards EIA/TIA-464-A and TR 41458 24-channel
interface supporting DID, TIE Line, and Loop or Ground Start are implemented. The DID and
TIE Line operation support Immediate, Delayed and Wink start signaling protocols. The Telco
interface must provide BZ8S line coding and Extended Super Frame (ESF) framing.
In PRI operation, the ISDN standard NII2 (National ISDN Interface 2) 23 Bearer and one (1)
Data channel interface is supported. The PRI operation employs ANSI T1.403, T1.601, T1.605,
and TR62411 standards.
Connection is made via a RJ45 from the PRIB to a CSU (Channel Service Unit).
Figure 5.3.4-1 T1 PRIB
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