04-25-2014 10:21 AM - edited 03-16-2019 10:35 PM
04-25-2014 05:04 PM
Weird issue, could you tell us what call control - CUCM/CME, version, phones, firmware version? Is this issue happening on phones on the same switch?
05-28-2014 10:31 AM
MGCP gateway, SCCP phones. CUCM ver 7.1.5 but will be moving to 9.1 and going to a SIP gateway.
Phones are 79xx series phones. Latest firmware supported for 7.1.5.
Yes, the issue occurs on-net even within the same switch.
I have a TAC case open and based on the logs, he thinks the call setup request is being sent on the data vlan and the phone is not responding, then timing out. CUCM re-sends the request and then the phone responds and sets up the RTP stream.
We've had bad luck doing wireshark captures to truly lock down the issue.
Sorry for the delay in response.
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