"Error: 488: not acceptable here" in officesip (uses uccapi)

Question

I am developing a softphone,using "officesip (https://sourceforge.net/projects/officesip/)", I succeeded in establishing call between subscribers, but while a receiver picks up the call the, the call is terminated,showing "error:488:not acceptable here".

At sender side, I found that the error is related to media compatibility issue. But I couldn't find how to solve it, where do I need to configure or change?

Notes:

1. I have only headset connected to my PC no webcams

2. SIP server is NGCP-SIPWISE

3. The call works perfectly when I call from "officesip" to "X-lite",but terminates when I call between two "officesip",after receiver picks up,with status 488.

Answer 1

The "488 Not acceptable here" means audio codec incompatibility problems. Make sure that both ends has at least one common codec. You can see the codec list in the INVITE message SDP part (with the m=audio line the codec payload numbers are enumerated and also in the a=rtpmap lines as text).

Also it might be a bug in officesip. In this case I would recommend to enable only one single codec on both end (such as PCMU) and try a call.