I have AS5300 with IOS 12.3(13b). My customer uses proprietary SIP Pabx. Standard call works fine, bud there is a problem with call transfer. After the call is put on hold and unhold on PABX side, AS5300 does not connect back to UDP port of customer's SIP PABX.
In detailed SIP analysis I saw that PABX has changed the UDP port of original connection in RE-INVITE message.
Does it conform the RFCs ?
Any idea how to set my AS5300 to accept the new UDP port in RE-INVITE message ?
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