Avaya Communication Manager Administrator's Manual page 1602

Screen Reference
Comm Type
Use this field to define whether the trunk group carries voice, data, or both.
Note:
Comm Types of avd, rbavd and data require trunk member ports on a DS1
Note:
circuit pack.
Valid entries
avd
data
rbavd
voice
COR
Decisions regarding the use of Class of Restriction (COR) and Facility Restriction Levels (FRLs)
should be made with an understanding of their implications for allowing or denying calls when
AAR/ARS/WCR route patterns are accessed. For details on using COR and FRLs, see Avaya
Toll Fraud and Security Handbook, 555-025-600.
Valid entries
0 to 995
1602 Administrator Guide for Avaya Communication Manager
Usage
Enter avd for applications that mix voice and Digital Communication
Protocol data, such as video conferencing applications. The receiving end
media server or switch discriminates voice calls from data calls and
directs each to an appropriate endpoint. Neither originating nor
terminating ends insert a modem pool for any calls when Comm Type is
avd.
The Signaling Mode field on the DS1 Circuit Pack screen must be set
for either common-chan or CAS signaling.
Enter data only when all calls across the trunk group originate and
terminate at Avaya Communication Manager digital data endpoints.
Public networks don't support data: supported by Avaya's DCP protocol,
this entry is used almost exclusively for the data trunk group supporting
DCS signaling channels.
The Signaling Mode field on the DS1 Circuit Pack screen might be set
to robbed-bit or common-chan.
For digital trunk groups that carry voice and data with robbed-bit signaling.
The Signaling Mode field on the DS1 Circuit Pack screen must be set to
robbed-bit unless mixed mode signaling is allowed on the DS1 circuit
pack. In that case, the Signaling Mode field might be isdn-ext or
isdn-pri.
For trunk groups that carry only voice traffic and voice-grade data (that is,
data transmitted by modem). Analog trunk groups must use voice.
Usage
Enter a class of restriction (COR). Classes of restriction control access to
trunk groups, including trunk-to-trunk transfers.