Isdn-Sgr (Isdn-Pri Signaling Group) - Avaya G350 Maintenance Manual

Avaya Communication Manager controlled maintenance

ISDN-SGR (ISDN-PRI Signaling Group)

ISDN-SGR (ISDN-PRI Signaling Group)
Table 78: ISDN-SGR (ISDN-PRI Signaling Group)
MO Name (in
Alarm Log)
ISDN-SGR
ISDN-SGR
*grp# is the signaling group number (1-166); the test sequence can be either short or long.
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 MM710 Interface Media Module, 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
•
NFAS duplex signaling
In a FAS signaling group, the 24th port of the DS1 MM Interface Media Module carries D-channel
signaling for up to 23 B-channel ports on the same Media Module.
In an NFAS signaling group, the 24th port of one DS1 MM Interface can carry D-channel signaling for B-
channels on several other DS1 Media Module as well, including TN767s and TN464Bs. The 24th port on
the other Media Modules can be used for B-channels. A D-channel in an NFAS group can signal for B-
channels on a total of 20 DS1 Media Modules.
NFAS duplex signaling provides increased reliability, which is highly desirable since NFAS permits the
D-channel to signal for many more B-channels. NFAS Duplex allows the administration of a backup D-
channel which remains in a standby state until the active D-channel goes down. If the active D-Channel
does go down, the backup D-Channel takes over and provides signaling for all the B-channels in the
signaling group.
140
Initial Command
Alarm Level to Run*
MINOR test sig-group grp#
WARNING test sig-group grp#
Maintenance of the Avaya G350 Media Gateway
Full Name of MO
ISDN-PRI Signaling Group
ISDN-PRI Signaling Group
June 2004