Hello All, Would like to clarify under what circumstances UAC gets "404-NOT Found---Reason=unallocated number" for an INVITE request; Sip trunk established between UAC & Cisco call manager;
Call path: UAC -----> cisco cm ----> voice gateway ------> (ITSP) We captured wireshark traces for 404-Not Found messages and some phone numbers are actually invalid numbers and some phone numbers are valid; The INVITE request having timeout set as 'SIP header ==Expires: 180'. This is as suggested & being asked us to put in here for the calls to work; We did faced more calls getting 404-NotFound response. So trying to find what are all the possible scenarios the cisco cm could send the 404-NotFound error response; Some reason like 1. The dialling number itself is invalid and service provider plays the message saying "like...number is invalid.." 2. Due to not enough bandwidth between voice gateway & ITSP 3. Due to not enough bandwidth between cisco cm & voice gateway --- (This is least option if all the ports in gateway are busy.... The cm should send busy instead of 404-NotFound..) 4. Comments from other team says the UAC is sending something wrong here because of which more 404-NotFound; --- randomly we picked some 404-NotFound numbers and tested by manual dialling and found those were valid numbers. Any other reasons for 404-NotFound?? -- How to troubleshoot these issues; Regards Mahu _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
