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-c hannels for which a given
ISDN-PRI Signaling Channel Port (D-channel) carries signaling information.
B-channels carry voic e or data and can b e assigned to DS1 ISDN trunks
(ISDN-TRK) or PRI endpoint ports (PE-BCHL).
NOTE:
Throughout this discussion the term B-c hannels refers to ISDN-TRKs or
PE-BCHLs, depending on the ap plication under investi gation.
The following circuit pac ks are supported in the implementation of ISDN-PRI.
The TN464C/D UDS1 Interface circuit pack, whi ch has a direct interfac e to the
packet bus, is req uired 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 c hannel on a 2.048 Mbps link
The following discussion d escribes 24-channel inter face signaling g roups. 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 throug h 15 and 17 through
31 are used for B-channels. The 32nd c hannel (port 0) is always used for
framing.
ISDN-PRI D-channel signaling can be c ombined 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
Run1
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)