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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Features and technical reference
1321DS1 Trunk Service
20
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 DEFINITY ECS public network access connections for
ISDN-PRI Layer 3.
Admin
value Country Protocol supported
B-channel
mtce msg
1 - a United States,
Canada
AT&T TR 41449/ 41459 (tested with AT&T
network, Canadian network, and MCI
network)
Service
1 - b United States Bellcore TR 1268;
NIUF.302; ANSI T1.607
Restart
1 - c United States NORTEL DMS-250 BCS36/IEC01 Service
2a Australia AUSTEL TS014.1;
Telecom Australia TPH 1856 National ISDN
protocol
Restart
2b Australia ETSI ISDN protocol Restart
3 Japan NTT INS-NET Restart
4 Italy ETS 300 102 Restart
5 Netherlands ETS 300 102 Restart
6 Singapore ETS 300 102 Restart
7 Mexico ETS 300 102 Restart
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