Thursday, December 19, 2013

SIP/2.0 483 Too Many Hops in Lync or SIP

EXAMPLE:

SEND --->


INVITE sip:callcentric.aaronin@sipsorcery.com;rinstance=232176 SIP/2.0
Via: SIP/2.0/UDP 204.11.192.37:5080;branch=z9hG4bK-6220bc0291f0e295c657a17fb7dbb588
To: <sip:17772276267@callcentric.com>
From: "Aaron Clauson" <sip:17772775881@callcentric.com>;tag=1752560849
Call-ID: 207152c94f98412c806f50c8f27f837f
CSeq: 2 INVITE
Contact: <sip:d24badac8b78c0ec1978a624b56e6050@204.11.192.37:5080;transport=udp>
Max-Forwards: 13
Content-Length: 342
Content-Type: application/sdp

v=0
o=Cisco-SIPUA 4475 0 IN IP4 204.11.192.37
s=SIP Call
c=IN IP4 204.11.192.37
t=0 0
m=audio 59826 RTP/AVP 8 0 18 101
c=IN IP4 204.11.192.37
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:18 G729/0
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=silenceSupp:off - - - -
a=setup:actpass
 RECEIVE --->
SIP/2.0 483 Too Many Hops
Via: SIP/2.0/UDP 69.59.142.213:5060;branch=z9hG4bKaf9695a95c294f22b5ecf7c1ba17dbd7;rport=5060
To: <sip:17772276267@in.callcentric.com>
From: "Aaron Clauson" <sip:17772775881@callcentric.com>;tag=1146592129
Call-ID:
207152c94f98412c806f50c8f27f837f
CSeq: 2 INVITE
Content-Length: 0


This happens due to  Max-Forwards:
Here max-forwards is 13 which becomes zero but still didn't reach the destination as a result returns Too Many Hops .

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