Tbri-Bd (Tn); Isdn Trunk-Side Bri - Avaya S8700 Maintenance Manual

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8
TBRI-BD (TN2185

ISDN Trunk-Side BRI)

MO's Name (in
Alarm Log)
TBRI-BD
1. Where UU is the universal cabinet number (1–64), C is the carrier designation (A, B, C, or D),
SS is the carrier slot address where the circuit pack resides (01–10), and pp is the 2-digit port
number (1, 2, 3, and so forth).
The TN2185 circuit pack contains eight, 4-wire ports that interface to the network
at the ISDN S/T reference point over two 64-kbps channels (B1 and B2) and over
a 16-kbps 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 PPE (Packet Processing Element) limitations. The
D channel is either circuit-switched or packet-switched. Packet switching uses
the PPE to combine every D channel into a single physical channel, which is then
routed via the concentration highway to the NCE (Network Control Element) and
then to the TDM bus. The circuit-switched connections have a Mu-law or A-law
option for voice and operate as 64-kbps 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.
8-1068 Issue 1 May 2002
Alarm Level Initial Command to Run
MINOR test board UUCSS l r#
1
Full Name of MO
TBRI-BD
555-233-142