DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1673TBRI-PT (TN2185 ISDN Trunk-Side BRI Port)
9
TBRI-PT (TN2185 ISDN Trunk-Side BRI Port)
This document describ es the port maintenance features of the DEFINITY® ISDN
Trunk-side BRI board (TN2185). The circuit pack p rovides 8 S/T ISDN 2B+D
ports that interface to either the c entral office or another PBX.
The TN2185 circuit pack conta ins eight, 4-wire ports that interfac e 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 c an be simultaneously
circuit switched , or individually pac ket switched. Only one channel p er trunk can
be p acke t switc hed due t o Pack et Proc essin g Eleme nt (PPE) l imita tions. The D
channel is either circuit switc hed or packet switc hed. Packet switching uses the
PPE to combine all D channels into a single ph ysical channel, which is then
routed via the concentration hig hway 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 op erate as 64Kb/s clear dat a channels. The
packet-switched channels support the LAPD p rotocol and conform with the
CCITT Q.920 Recommendations for D-channel signaling.
LEDs
The three LEDs on the circuit pack’s fac eplate indicate board status. When
illuminated, the red LED indic ates a board failure or a major or minor on-b oard
alarm, the green LED indicates that testing is in progress, and the amb er LED
indicates that the board is in use.
MO Name (in
Alarm Log) Alarm Level Initial Command to Run1
1. Where UU is the universal cabinet number (1 for PPN, 2 -44 for EP N), C is the carrier designation
(A, B, C, D, or E), SS is the carrier slot address where the circuit pack is located (1, 2, and so
forth), and pp is the two-digit port number (1, 2, 3, and so forth).
Full Name of MO
TBRI-PT MAJOR test port UUCSS l r# TBRI-PT
TBRI-PT MINOR test port UUCSS l r# TBRI-PT
TBRI-PT WARNING test port UUCSS s r# TBRI-PT