Isdn-Lnk (Isdn-Pri Signaling Link Port) - Avaya G700 Maintenance Manual

6 Avaya MultiVantage Software-Controlled Maintenance:

ISDN-LNK (ISDN-PRI Signaling Link Port)

Table 30. ISDN-LNK (ISDN-PRI Signaling Link Port)
MO Name (in
Alarm Log)
ISDN-LNK**
ISDN-LNK
*pp is 24 for 24-channel interfaces and 16 for 32-channel interfaces.
Note: You must consult local records for the location and designation of the
equipment rack where the G700 is mounted.
**For additional related information, see USD1-BD and DS1-MM MOs.
The ISDN-PRI interface uses out-of-band signaling (as opposed to robbed-bit, in-band signaling) to
transmit control messages between two endpoints. User information channels carry digitized voice
and digital data and are known as bearer channels (B-channels). B-channels are assigned to DS1
ISDN trunks or PRI endpoints. Call control signaling for the B-channels is combined and carried over
the separate ISDN-PRI Signaling Link Port D-channel.
The ISDN-PRI Signaling Link Port (ISDN-LNK) is a port on a MM710, which has a direct interface
to the packet bus which carries D-channel messages to the processor. The associated B-channels can
use ports on the same Media Module or ports on other MM710s.
Two types of DS1 interfaces exist:
• 24 DS0 channels on a 1.544 Mbps link
• 31 DS0 channels + 1 framing channel on a 2.048 Mbps link
On 24-channel interfaces, the B-channels may use any of the first 23 ports. The signaling link is
assigned to the 24th port. On 32-channel interfaces, the DS1 ISDN Trunks (B-channels) may use any
of ports 1 to 15 and 17 through 31. The signaling link is assigned to the 16th port. The 32nd channel
(port 0) is used for framing. In NFAS configurations, the 24th or 16th ports on some of the DS1
Media Modules may be used for B-channels. Refer to ISDN-SGR for further information.
A problem with the ISDN-LNK will have an effect on all of the associated B-channels since without
it no call control information can be conveyed to the far-end switch or terminal adapter. Stable calls
may remain operational, but no new calls can be made. The ISDN-LNK in turn depends on the
MM710 it resides on which provides the link to the processor. If there are problems with the ISDN-
LNK, also investigate the MM710 Interface Media Module (MG-DS1).
162
Alarm Level Initial Command to Run*
MINOR test port GGGVSpp l
WARNING test port GGGVSpp sh
ISDN-LNK (ISDN-PRI Signaling Link Port)
Full Name of MO
ISDN-PRI Signaling
Link Port
ISDN-PRI Signaling
Link Port
Maintenance for S8300/S8700 and G700
555-234-101 — Issue 2 — October 2002