The channels should be set for TIE-DNIS. Also, make sure that the 24th channel is set to trunk group 0 and is in the out of service state. If there's one thing that Vodavi told me that I'll never forget, it's that these problems are ALWAYS the carrier. In the ten years or so that I've been installing PRI's on their systems, I must say that they are right.

One other thing to ask the carrier to check in their DMS: There is a table called "LTDEF". In this table, there is a definition called a "variant". Ask them to make sure that the definition of this variant is set to NI PRI.

You might also want to run an "L" trace to see if there's any rhyme or reason for this. It's usually due to call collisions occurring. If an incoming and outgoing call collide, this will take the channel out of service. When using "most idle" hunting, the risk of collisions is greater. The trunks really should be set to hunt sequentially from first to last since outgoing calls hunt from last to first.

Ed Vaughn, MBSWWYPBX