H323-Bch (H.323 B Channel) - Avaya S8700 Maintenance Manual

Maintenance-Object Repair Procedures

H323-BCH (H.323 B Channel)

No maintenance diagnostic tests exist for this object.
H.323 signaling is very similar to ISDN Q.931 signaling. In order to take
advantage of existing S8700 Multi-Connect ISDN Avaya MultiVantage™ software,
H.323 trunk Avaya MultiVantage ™ software includes H.323 signaling groups,
H.323 D channels and H.323 B channels. H.323 signaling groups are similar in
concept to ISDN PRI signaling groups. H.323 D-channels are an artificial
fabrication created only to allow maximum re-use of system ISDN code. H.323 B
channels are also an artificial fabrication.
No physical hardware components make up the H.323 B-channel object
discussed here. Along with the D channel, these objects allow existing ISDN
Avaya MultiVantage ™ software to be re-used for H.323 trunking. The H.323
signaling group is not a collection of physical D-channels that exist on one or more
DS1 facilities. The H.323 signaling group can be considered to be one D channel
that physically rides on a C-LAN port and the IP network. Unlike ISDN
D-channels, the H.323 D channel may actually come up and down on a
call-by-call basis. So the H.323 D channel is actually a TCP/IP signaling channel.
Layer 1 and 2 of this signaling channel can be monitored by IP PING testing.
Performance in terms of voice latency for a signaling group is monitored by
background measurements being collected by the TN802B Media Processor
board.
H.323 B channels actually use TN802B Media Processor ports to carry the actual
bearer. The TN802B is a service circuit. On a call-by-call basis, any port of a
TN802B may be serving an H.323 station or an H.323 B channel. Status
information may exist for a specific H.323 B channel, and an H.323 B channel
may be busied out and released, but no maintenance diagnostic tests will exist for
the object.
Errors are logged for craft busyout conditions. The system receives service state
updates for craft-driven busyout/release. Under normal conditions the system
automatically places H.323 B channels into or out of service when it receives an
H.323 signaling-group service state update. Craft busyout drops active calls.
Error Log Entries and Test to Clear Values
Table 8-339. H323-BCH B-Channel Error Log Entries
Error Aux
Type Data Associated Test
18 Any B-channel busied out
8-888 Issue 1 May 2002
Alarm On/Off
Level Board
Warning off
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Service State
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