I have a strange problem over a SIP trunk. I configured a SIP trunk between CCM 5.1 and a HiPath 3000 V7.0.
When I am calling analog phones from Cisco Ip Phones first call is ok but second call ring and receive busy when I want to answer. I receive "Reason: Q.850;cause=47" for the second call. I have not problems with MTP. I configured hardware MTPs for this trunk. I am monitoring Xcoders, I saw when first call invoked xcoder, I saw I have enough xcoders available, I saw CCM allocated MTP for second call in traces("mMtpAllocated=1") but after that I had a bye message from CCM.
I attached the relevant debug.
Has anybody an ideea about what could be the cause for this?