DS1 TIE Avaya - NEC Robbed Bit

[keschber]

I am looking for some config help here. I have a an Avaya CM 5.2.1 connected to an NEC switch. The trunk is a T1 TIE, robbed bit. I can place calls across this trunk (avaya to NEC), but inbound calls from teh NEC fail. I can trace the TAC and see the channel go active, but then a long pause then the channel drops and I hear busy signal. I can provide more config details if anyone has any ideas.

This is the config of the Avaya trunk group.

display trunk-group 880 Page 1 of 22
TRUNK GROUP

Group Number: 880 Group Type: tie CDR Reports: y
Group Name: [NAME}
COR: 35 TN: 1 TAC: *880
Direction: two-way Outgoing Display? n Trunk Signaling Type:
Dial Access? y Busy Threshold: 255 Night Service:
Queue Length: 0 Incoming Destination:
Comm Type: voice Auth Code? n
Trunk Flash? n

Trunk Type (in/out): wink/auto

 

[uzumaki]

can u post the DS1 config here? Who provides the master clocking?

 

[keschber]

I'm not sure where the clock is set at. Here is the DS1 config.

display ds1 80v2 Page 1 of 2
DS1 CIRCUIT PACK

Location: 080V2 Name: Vancouver WA
Bit Rate: 1.544 Line Coding: b8zs
Line Compensation: 1 Framing Mode: esf
Signaling Mode: robbed-bit



Interface Companding: mulaw
Idle Code: 11111111





Slip Detection? n Near-end CSU Type: other

Echo Cancellation? n



display ds1 80v2 Page 2 of 2
DS1 CIRCUIT PACK

ESF DATA LINK OPTIONS

Network Management Protocol: tabs
Send ANSI-T1.403 One-Second Performance Reports? n
Far-end CSU Address: b