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New Member

Busy signal with more than 2 calls on gateway

Hi guys,

I have a cluster with three CUCM 8.5. We're using a third-party PBX to make external calls, connected with a SIP Trunk.

Last week I installed two ISR 3925, created a new route pattern which uses our voice gateways when I call to a specific number.

The problem is that sometimes I got a busy signal.

Tried some possibilities and discovered the following:

Route Group with both gateways selected // Distribution algorithm Top Down

One call connected. When I try to start the second call I hear busy signal.

If I reverse the order of the gateways, the same problem.

Route Group with both gateways selected // Distribution algorithm Circular

Two calls connected. When I try to start the third call I hear busy signal.

If I reverse the order of the gateways, the same problem.

Route Group with one gateway selected // Distribution algorithm Top Down or Circular

One call connected. When I try to start the second call I hear busy signal.

If I select the other gateways, the same problem.

Do you have any clue?

Thank you!

1 REPLY
New Member

Busy signal with more than 2 calls on gateway

Hi !

Did you able debug the SIP traces in the Voice Gateway ?

You have to take care of IP trusted authentication in the Gateway as well.

Thanks

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