TBRI-TRK (Trunk-Side ISDN BRI)
Issue 1 May 2002
8-1577555-233-143
TBRI-TRK (Trunk-Side ISDN BRI)
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- 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.
MO’s Name (in
Alarm Log) Alarm Level Initial SAT Command to Run
1
1. Where UU is the universal cabinet number (1–64 for ATM PNC, 1–44 for CSS PNC), C is the carrier
designation (A, B, C, D, or E), SS is the carrier slot address where the circuit pack resides (01–21), and pp
is the 2-digit port number (1, 2, 3, and so forth).
Full Name of MO
TBRI-TRK
2
2. For additional repair information, also see ‘‘TBRI-BD (TN2185 ISDN Trunk-Side BRI)’’ and ‘‘TBRI-PT (ISDN
Trunk-Side BRI Port)’’ maintenance documentation.
MAJOR
3
3. A MAJOR alarm on a trunk indicates that alarms on these trunks are not downgraded by the set options
command and that at least 75 percent of the trunks in this trunk group are alarmed.
test trunk UUCSSpp l MO_TBRI_TRK
TBRI-TRK MINOR test trunk UUCSSpp l MO_TBRI_TRK
TBRI-TRK WARNING test trunk UUCSSpp sh MO_TBRI_TRK
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