Avaya Communication Manager Administrator's Manual page 896

Screen Reference
Signaling Mode
This field selects the signaling method used for the DS1 link. This mode must match the method
used on the other end of the link, so work with your network services provider to determine the
appropriate entry for this field.
Valid entries
CAS (Channel
Associated
Signaling)
robbed-bit
isdn-pri
isdn-ext
common-chan
T303 Timer (sec)
Use this field to enter the number of seconds the system waits for a response from the far end
before invoking Look Ahead Routing. Appears when the Group Type field is isdn-pri.
Valid entries
2 to 10
896 Administrator Guide for Avaya Communication Manager
Usage
Enter CAS for out-of band signaling with E-1 service.
This setting yields 30 64-kbps B-channels for voice or
data transmission. Channel 0 is used for framing while
channel 16 carries signaling.
Enter robbed-bit for in-band signaling with T-1 service.
This setting yields 24 56-kbps B-channels for voice
transmission.
Enter isdn-pri for either T-1 or E-1 ISDN service. This
setting supports both Facility Associated Signaling and
Non-Facility Associated Signaling.
Enter isdn-ext for either T-1 or E-1 ISDN service. This
setting supports only Non-Facility Associated Signaling.
Enter common-chan, for out-of-band signaling with T-1
service. This setting yields 23 64-kbps B-channels for
voice or data transmission. Channel 24 is used for
signaling.
Usage
Enter a number of seconds between 2 and 10. Default is
4. If Long Timers is enabled, defaults to a read-only
value of 13.