Got a little confusion here.
FreeSWITCH log: http://pastebin.freeswitch.org/21226
SIP trace: http://pastebin.freeswitch.org/21227

Both were taken once after each other but other than the timing, everything else remains the same.

This is a vanilla install for FreeSWITCH Version 1.5.5b+git~20130724T035836Z~3ae87091e1 (git 3ae8709 2013-07-24 03:58:36Z). Just dialing a non existent number (98871002) from a registered user 1001. The hangup cause returned by the switch shows
  • mod_sofia.c:463 Channel sofia/internal/1001@10.211.55.3:50601 hanging up, cause: NORMAL_CLEARING

    • However the SIP capture shows     SIP/2.0 480 Temporarily Unavailable. This 480 is also showing by the switch mod_sofia.c:597 Responding to INVITE with: 480. I know the mapping is done by FreeSWITCH. In this case why 480, returned Normal Temporary Failure while the switch shows NORMAL_CLEARING? Is this because Q.850 returned is 16 and FreeSWITCH mapping for 16 is NORMAL_CLEARING?

    Or is there something I am missing.

    --
    Thanks,
    Muhammad Naseer Bhatti