DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-942ISDN-SGR (ISDN-PRI Signaling Group)
9
ISDN-SGR (ISDN-PRI Signaling
Group)
An ISDN-PRI Signaling Group is a collection of B-channels for which a given
ISDN-PRI Signaling Channel Port (D-channel) carries signaling information.
B-channels carry voice or data and can be assigned to DS1 ISDN trunks
(ISDN-TRK) or PRI endpoint ports (PE-BCHL).
NOTE:
Throughout this discussion the term B-channels refers to ISDN-TRKs or
PE-BCHLs, depending on the application under investigation.
The following circuit packs are supported in the implementation of ISDN-PRI.
The TN464C/D UDS1 Interface circuit pack, which has a direct interface to the
packet bus, is required for D-channel signaling. There are two types of DS1
interfaces:
■ 24 DS0 channels on a 1.544 Mbps link
■ 31 DS0 channels + 1 framing channel on a 2.048 Mbps link
The following discussion describes 24-channel interface signaling groups. The
32-channel interface works the same way, except that only port number 16 is
used for signaling instead of port number 24. Ports 1 through 15 and 17 through
31 are used for B-channels. The 32nd channel (port 0) is always used for
framing.
ISDN-PRI D-channel signaling can be combined with a group of B-channels in
three basic ways:
■ Facility-associated signaling (FAS)
■ Nonfacility-associated (NFAS) simplex signaling
MO Name (in
Alarm Log) Alarm Level
Initial Command to
Run
1
1.
grp#
is the signaling group number (1-166); the test sequence can be either short or long.
Full Name of MO
ISDN-SGR MINOR test sig-group
grp#
ISDN-PRI Signaling Group
ISDN-SGR WARNING test sig-group
grp#
ISDN-PRI Signaling Group
Circuit Pack Channel Types Interface
TN464C/D B and D channels 24 or 32 channel
TN767 B channels 24 channel
TN464B B channels 32 channel (G3r V2 only)
