Avaya Communication Manager Administrator's Manual page 1516

Feature Reference
DS1 trunk service
Signaling modes
Common-channel signaling (CCS) is an industry-standard technique where any one of a group of
channels carries the signals for the other channels. Avaya uses the 24th channel of a group for signaling.
This signaling technique differs from 24-channel signaling. When the system is configured for
Facility-Associated Signaling, 24-channel signaling uses the 24th channel in a DS1 facility to carry
signals. This technique also is called clear channel, out-of-band, or alternate voice data (AVD) signaling.
Channel Associated Signaling (CAS) is similar to common-channel signaling and is used only when the
Bit Rate is 2.048 Mbps (the trunk is used with an E1 interface). Signaling is carried on the 16th channel.
Common-channel signaling and channel associated signaling provide a maximum transmission rate of 64
Kbps for bearer channels.
Robbed-bit signaling is a per-channel signaling technique for transmitting signaling bits on each channel
in a DS1 facility. The least-significant bit in every 6th transmitted information frame is removed and
replaced by a signaling bit. This technique is also called in-band signaling. The maximum transmission
rate for each bearer channel with robbed-bit signaling is 56 Kbps.
ISDN-PRI signaling is carried on the 24th channel for a 1.544 Mbps connection and on the 16th channel
for a 2.048 Mbps connection.
Public network signaling administration for ISDN-PRI Layer 3
The table below shows Avaya Communication Manager public network access connections for
ISDN-PRI Layer 3.
Admin
value Country
1 - a United States,
Canada
1 - b United States
1 - c United States
1-d United States
2a Australia
2b Australia
3 Japan
4 Italy
5 Netherlands
6 Singapore
7 Mexico
8 Belgium
1516
Protocol supported
AT&T TR 41449/ 41459 (tested with AT&T
network, Canadian network, and MCI network)
Bellcore TR 1268;
NIUF.302; ANSI T1.607
NORTEL DMS-250 BCS36/IEC01
Telecordia SR-4287
AUSTEL TS014.1;
Telecom Australia TPH 1856 National ISDN
protocol
ETSI ISDN protocol
NTT INS-NET
ETS 300 102
ETS 300 102
ETS 300 102
ETS 300 102
ETS 300 102
Administrator's Guide for Avaya Communication Manager
B-channel
mtce msg
Service
Restart
Service
Service
Restart
Restart
Restart
Restart
Restart
Restart
Restart
Restart
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November 2003