Nortel Networks BCM1000 - Manual (Page 302)

302 Appendix A System region attributes
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BRI and PRI line types
Table 59 provides a description of the types of lines that BRI and PRI trunks can provide. These
are set under Resources/Media Bay Modules/Bus XX/Module X on the Unified Manager.
Note that some of these line types are only available when specific regions are chosen.
Italy ISDN ETSI 300 102
ETSI QSIG 300 239 ISDN ETSI 300 102 DASS2
DPNSS
MCDN
ETSI QSIG 300 239
ISDN ETSI 300 102
United Kingdom ETSI QSIG 300 239,
ISDN ETSI 300 403 ISDN ETSI 300 102 DASS2
DPNSS
MCDN
ETSI QSIG 300 239
ISDN ETSI 300 403
Table 59 BRI and PRI line types (DTM and BRI modules)
Digital trunk types Description
T1 digital line that carries data on 24 channels at 1.544 Mbps (North American); 30 channels
at 2,048 Mbps (Europe)
Loop, E&M, DID and ground start lines are also versions of T1 lines.
You can program auto-answer T1 loop start, T1 E&M trunks, T1 DID, T1 ground start
trunks, PRI and IP trunks to map to target lines to provide for attendant bypass (calling
directly to a department or individual) and line concentration (one trunk can map onto
several target lines).
DID This is a type of T1 trunk line that allows an outside caller to dial directly into a line on the
Business Communications Manager 2.5.
Loop This is a type of T1 line. This type of line is used on systems where the service provider
supports disconnect supervision for the digital loop start trunks.
These trunks provide remote access to the Business Communications Manager from the
public network. This trunk must have disconnect supervision to allow the trunk to be set to
auto-answer, which provides the remote access portal.
Ground T1-groundstart trunk
These lines offer the same features as loop start trunks, but are used when the local
service provider does not support disconnect supervision for digital loop start trunks.
Ground start trunks work with T1 only. By configuring lines as ground start, the system will
be able to recognize when a call is released at the far end.
E&M T1 and E&M. This type of trunk line is used to create simple network connections to other
phone systems.
This trunk always operates in a disconnected supervised mode.
Table 58 PRI line protocol supported, by region (Continued)
Region BRI T side BRI S side PRI T1