asterisk users - Nov 2009 - SIP 503 instead of SIP 480 in asterisk debug mode

Hi All,

I was actually trying to use the dialplan application that uses 'Dial'
and
when the: Dial(SIP/XXXXXXXXXX at xxxx|20|) command is executed and the
destination number rings for 20 sec after which I receive as "503 Service
Unavailable", but not "480 Temporarily unavailable".

Dial(SIP/XXXXXXXXXX at xxxx|20|)
exten => XXXXXX,n,NoOp(Dialstatus:${DIALSTATUS})
exten => XXXXXX,n,Congestion


 I can see that the "DialStatus" is NoAnswer but sends the 503
"Service
unavailable" message instead of 480 "Temporarily Unavailable". Is
there any
way of trying to get as "480  Temporarily available" as this is the
industry
standard for 'NoANSWER' ?

Thank you very much for your help.

Best Regards
Sandesh
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