Lucent Technologies Release 8.2 manual Troubleshooting IP Solutions, Trunk Problem Solving

Troubleshooting IP Solutions 2 H.323 Trunks

Troubleshooting IP Solutions

This section provides solutions to some commonly encountered problems with H.323 trunks and IP Softphones.

H.323 Trunk Problem Solving

Signaling group assignments

Multiple H.323 trunk groups can be assigned to a single signaling group, as with standard trunk groups that use circuit-switched paths. However, when multiple H.323 trunk groups have different attributes, it is usually better to assign each H.323 trunk group to a separate signaling group. An H.323 signaling group directs all incoming

calls to a single trunk group, regardless of how many trunk groups are assigned to

that signaling group. This is specified in the field “Trunk Group for Channel Selection” on the H.323 signaling group screen.

In the example shown in Figure 2, two trunk groups are assigned to the same signaling group on each of two switches, A and B. Trunk groups A1 and B1 are set up to route calls over a private network. Trunk groups A2 and B2 are set up to route calls over the public network. The signaling group on switch B terminates all incoming calls on trunk group B1 as specified by the “Trunk Group for Channel Selection” field. Calls from switch A to switch B using trunk group A1 and the private NW are terminated on trunk group B1, as desired. However, calls from switch A to switch B using trunk group A2 and the public NW are also terminated on trunk group B1, not trunk group B2, which would be the desired outcome.

		Administration for Network Connectivity
50	CID: 77730	555-233-504 — Issue 1 — April 2000