I am trying to configure a H323 gateway to work with a Avaya Merlin Magix PBX system. I have the IP side working fine but the Avaya side is unable to place outbound calls. Avaya side can receive inbound calls.
I have had the PBX vendor onsite and the Avaya is set for Primary-DMS100 and I have set the corresponding interface on the gateway as the same. I am getting the following error message when I place an outbound call
IOS on gateway is
System image file is "flash:c3825-adventerprisek9-mz.124-22.T.bin"
If I reboot the Gateway outbound calling will work on the Avaya side for a while but later on in the day the error message pops up again. I don't want to keep rebooting the gateway to fix the issue.
Im no expert on PBX integrations with IOS gateway, but the error you are receiving could be an issue with how the PBX and the gateway negotiate which b-channel to use. Under interface s0/1/0:23, try adding the command "isdn negotiate-bchan" and see if the behavior changes. Let us know.
On the Avaya side, can you verify which channel the outbound call is trying to use. According to the debug, the gateway appears to be trying to use channel 1 on the cisco side. I believe these 2 must match in order for the call to complete.
I don't have access to the Avaya PBX. I would have to get the Avaya Vendor who supports that system onsite. I did change the bchan-order to descending in the int ser 0/1/0:23 also to see if that would make a difference but it did not.
I have opened a case with TAC and I will post there results to this case.
One thing they are saying is to reconfigure the Avaya to user switchtype primary-4ess but this would also require me to get the Avaya vendor onsite.
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