DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-1023TBRI-BD (TN2185 ISDN Trunk-Side BRI)
3
TBRI-BD (TN2185 ISDN Trunk-Side BRI)
The TN2185 circuit pack c ontains eight, 4-wire ports that inter face 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 c hannel per trunk can
be p acke t swi tche d du e to Pa cket Proce ssing Elem ent (PPE) limit atio ns. The D
channel is either circuit swit ched or pac ket switched. Packet switc hing uses the
PPE to combine all D channels into a single ph ysical channel, whic h 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 suppor t the LAPD protocol and confor m 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 amber LED
indicates that the board is in use.
MO Name (in
Alarm Log) Alarm Level Initial Command to Run 1
1. Where P is the port network number (1), C is the carrier designation (A, B, or C), and SS is the
the carrier slot address where the circuit pack is located (1, 2, and so forth).
Full Name of MO
TBRI-BD MINOR test board PCSS l r# TBRI-BD