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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-1281TBRI-PT (TN2185 ISDN Trunk-Side BRI Port)
10
TBRI-PT (TN2185
ISDN Trunk-Side BRI Port)
This document describes the port maintenance features of the DEFINITY
®
ISDN
Trunk-side BRI board (TN2185). The circuit pack provides 8 S/T ISDN 2B+D
ports that interface to either the central office or another PBX.
The TN2185 circuit pack contains eight, 4-wire ports that interface to the network
at the ISDN S/T reference point over two 64 Kb/s channels (B1 and B2) and over
a 16Kb/s signaling (D) channel. The B1 and B2 channels can be simultaneously
circuit switched, or individually packet switched. Only one channel per trunk can
be packet switched due to Packet Processing Element (PPE) limitations. The D
channel is either circuit switched or packet switched. Packet switching uses the
PPE to combine all D channels into a single physical channel, which is then
routed via the concentration highway to the Network Control Element (NCE) and
then to the TDM bus. The circuit-switched connections have a Mu-law or A-law
option for voice and operate as 64Kb/s clear data channels. The
packet-switched channels support the LAPD protocol and conform with the
CCITT Q.920 Recommendations for D-channel signaling.
LEDs
The three LEDs on the circuit pack’s faceplate indicate board status. When
illuminated, the red LED indicates a board failure or a major or minor on-board
alarm, the green LED indicates that testing is in progress, and the amber LED
indicates that the board is in use.
1. Where P is the port network number (1 for PPN, 2 or 3 for EPN), C is the carrier designation (A,
B, C, D, or E), and SS is the carrier slot address where the circuit pack is located (1, 2, and so
forth).
MO Name (in
Alarm Log) Alarm Level Initial Command to Run
1
Full Name of MO
TBRI-PT MAJOR test port PCSS l r# TBRI-PT
TBRI-PT MINOR test port PCSS l r# TBRI-PT
TBRI-PT WARNING test port PCSS s r# TBRI-PT