No maintenance diagnostic tests exist for this MO.

H.323 signaling is similar to ISDN Q.931 signaling. To take advantage of the existing ISDN , the H.323 trunk Avaya Communication Manager 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 Communication Manager 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 IP-PROCR port and the IP network. Unlike ISDN D-channels, the H.323 D channel may 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 may be monitored by IP PING testing.

Performance in terms of voice latency for a signaling group is monitored by background measurements collected by the media processor board.

H.323 B-Channels use media processor ports to carry the actual bearer. The media processor port is a service circuit. On a call-by-call basis, any port of a media processor 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 or 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.