DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-1031TBRI-PT (TN2185 ISDN Trunk-Side BRI Port)
3
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 provid es 8 S/T ISDN 2B+D
ports which interfac e to either the central office or another PBX.
The TN2185 circuit pack c ontains eight, 4-wire ports that interf ace 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 Elem ent (PPE) limit ations . The D
channel is either circuit swit ched or packet sw itched. Packet switching uses the
PPE to combine all D channels into a single ph ysical channel, which is then
routed via the concentration hi ghway 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 d ata channels. The
packet-switched channels support the L APD protocol and conform with the
CCITT Q.920 Recommendations for D-channel signaling .
LEDs
The three LEDs on the circuit pack’s fac eplate indicate b oard 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 testin g is in progress, and the am ber LED
indicates that the board is in use.
MO Name (in
Alarm Log) Alarm Level Initial Command to Run1
1. Where P is the port network number (1), C carrier designation (A, B, or C), and SS is the carrier
slot address where the circuit pack is located (1, 2, and so forth).
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