<DIV>Here is the detail:</DIV>
<DIV>Both Cisco 7960 loaded with SIP firmware: P0S3-08-9-00</DIV>
<DIV>They both uses static IP address. </DIV>
<DIV>I am running Freeswitch 1.0.6</DIV>
<DIV>The following is the SIP trace: (I altered IP addresses)</DIV>
<DIV>&nbsp;</DIV>
<DIV>U 222.111.000.144:50745 -&gt; 222.111.000.177:5060<BR>&nbsp; INVITE sip:1004@222.111.000.177;user=phone SIP/2.0..Via: SIP/2.0/UDP 222.111.000.144:5060;branch=z9hG4bK43506416..From:<BR>&nbsp; "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=00082166efcb01396b803ac6-7e5ae7dc..To: &lt;sip:1004@222.111.000.177;user=phone&gt;..Cal<BR>&nbsp; l-ID: <A href="mailto:00082166-efcb0019-398a09d5-5e799be0@222.111.000.144..Max-Forwards">00082166-efcb0019-398a09d5-5e799be0@222.111.000.144..Max-Forwards</A>: 70..Date: Tue, 04 May 2010 12:17:11 GMT..CSeq:<BR>&nbsp; 101 INVITE..User-Agent: Cisco-CP7960G/8.0..Contact: &lt;sip:1008@222.111.000.144:5060;transport=udp&gt;..Expires: 180..Accept:<BR>&nbsp;&nbsp; application/sdp..Allow: ACK,BYE,CANCEL,INVITE,NOTIFY,OPTIONS,REFER,REGISTER,UPDATE..Supported: replaces,join,norefersub<BR>&nbsp; ..Content-Length: 282..Content-Type: application/sdp..Content-Disposition: session;handling=optional....v=0..o=Cisco-SIP<BR>&nbsp; UA 11004 0 IN IP4 222.111.000.144..s=SIP Call..t=0 0..m=audio 21654 RTP/AVP 0 8 18 101..c=IN IP4 222.111.000.144..a=rtpm<BR>&nbsp; ap:0 PCMU/8000..a=rtpmap:8 PCMA/8000..a=rtpmap:18 G729/8000..a=fmtp:18 annexb=no..a=rtpmap:101 telephone-event/8000..a=f<BR>&nbsp; mtp:101 0-15..a=sendrecv..<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.144:5060<BR>&nbsp; SIP/2.0 100 Trying..Via: SIP/2.0/UDP 222.111.000.144:5060;branch=z9hG4bK43506416..From: "Line2" &lt;sip:1008@222.111.000.17<BR>&nbsp; 7&gt;;tag=00082166efcb01396b803ac6-7e5ae7dc..To: &lt;sip:1004@222.111.000.177;user=phone&gt;..Call-ID: 00082166-efcb0019-398a09d5<BR>&nbsp; <A href="mailto:-5e799be0@222.111.000.144..CSeq">-5e799be0@222.111.000.144..CSeq</A>: 101 INVITE..User-Agent: FreeSWITCH-mod_sofia/1.0.6-svn-exported..Content-Length: 0....<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.102:5060<BR>&nbsp; INVITE sip:1004@222.111.000.102:5060;transport=udp SIP/2.0..Via: SIP/2.0/UDP 222.111.000.177;rport;branch=z9hG4bKB5vj0Sm<BR>&nbsp; 350B9r..Max-Forwards: 68..From: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=9BNeN21mSySQN..To: &lt;sip:1004@222.111.000.102:5060<BR>&nbsp; ;transport=udp&gt;..Call-ID: ff905261-d218-122d-9ab7-6d55cd3bb1e9..CSeq: 130369205 INVITE..Contact: &lt;sip:mod_sofia@222.111.<BR>&nbsp; 120.177:5060&gt;..User-Agent: FreeSWITCH-mod_sofia/1.0.6-svn-exported..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, U<BR>&nbsp; PDATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: timer, precondition, path, replaces..Allow-Events:<BR>&nbsp; talk, presence, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer.<BR>&nbsp; .Content-Type: application/sdp..Content-Disposition: session..Content-Length: 433..X-FS-Support: update_display..Remote-<BR>&nbsp; Party-ID: "Line2" &lt;sip:1008@222.111.000.177&gt;;party=calling;screen=yes;privacy=off....v=0..o=FreeSWITCH 1272956499 127295<BR>&nbsp; 6500 IN IP4 222.111.000.177..s=FreeSWITCH..c=IN IP4 222.111.000.177..t=0 0..m=audio 18584 RTP/AVP 0 115 107 9 8 3 101 13<BR>&nbsp; ..a=rtpmap:0 PCMU/8000..a=rtpmap:115 G7221/32000..a=fmtp:115 bitrate=48000..a=rtpmap:107 G7221/16000..a=fmtp:107 bitrate<BR>&nbsp; =32000..a=rtpmap:9 G722/8000..a=rtpmap:8 PCMA/8000..a=rtpmap:3 GSM/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101 0<BR>&nbsp; -16..a=rtpmap:13 CN/8000..a=ptime:20..<BR>#<BR>U 222.111.000.102:51984 -&gt; 222.111.000.177:5060<BR>&nbsp; SIP/2.0 100 Trying..Via: SIP/2.0/UDP 222.111.000.177;rport;branch=z9hG4bKB5vj0Sm350B9r..From: "Line2" &lt;sip:1008@222.111.<BR>&nbsp; 120.177&gt;;tag=9BNeN21mSySQN..To: &lt;sip:1004@222.111.000.102:5060;transport=udp&gt;..Call-ID: ff905261-d218-122d-9ab7-6d55cd3b<BR>&nbsp; b1e9..Date: Tue, 04 May 2010 12:17:12 GMT..CSeq: 130369205 INVITE..Server: Cisco-CP7960G/8.0..Contact: &lt;sip:1001@222.111<BR>&nbsp; .000.102:5060;transport=udp&gt;..Allow: ACK,BYE,CANCEL,INVITE,NOTIFY,OPTIONS,REFER,REGISTER,UPDATE..Content-Length: 0....<BR>#<BR>U 222.111.000.102:51985 -&gt; 222.111.000.177:5060<BR>&nbsp; SIP/2.0 180 Ringing..Via: SIP/2.0/UDP 222.111.000.177;rport;branch=z9hG4bKB5vj0Sm350B9r..From: "Line2" &lt;sip:1008@222.111<BR>&nbsp; .000.177&gt;;tag=9BNeN21mSySQN..To: &lt;sip:1004@222.111.000.102:5060;transport=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..Ca<BR>&nbsp; ll-ID: ff905261-d218-122d-9ab7-6d55cd3bb1e9..Date: Tue, 04 May 2010 12:17:12 GMT..CSeq: 130369205 INVITE..Server: Cisco-<BR>&nbsp; CP7960G/8.0..Contact: &lt;sip:1004@222.111.000.102:5060;transport=udp&gt;..Allow: ACK,BYE,CANCEL,INVITE,NOTIFY,OPTIONS,REFER,R<BR>&nbsp; EGISTER,UPDATE..Content-Length: 0....<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.144:5060<BR>&nbsp; SIP/2.0 183 Session Progress..Via: SIP/2.0/UDP 222.111.000.144:5060;branch=z9hG4bK43506416..From: "Line2" &lt;sip:1008@204.<BR>&nbsp; 126.000.177&gt;;tag=00082166efcb01396b803ac6-7e5ae7dc..To: &lt;sip:1004@222.111.000.177;user=phone&gt;;tag=82UNK7gHvN34S..Call-ID<BR>&nbsp; : <A href="mailto:00082166-efcb0019-398a09d5-5e799be0@222.111.000.144..CSeq">00082166-efcb0019-398a09d5-5e799be0@222.111.000.144..CSeq</A>: 101 INVITE..Contact: &lt;sip:1004@222.111.000.177:5060;transpo<BR>&nbsp; rt=udp&gt;..User-Agent: FreeSWITCH-mod_sofia/1.0.6-svn-exported..Accept: application/sdp..Allow: INVITE, ACK, BYE, CANCEL,<BR>&nbsp; OPTIONS, MESSAGE, UPDATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: timer, precondition, path, repla<BR>&nbsp; ces..Allow-Events: talk, presence, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, mess<BR>&nbsp; age-summary, refer..Content-Type: application/sdp..Content-Disposition: session..Content-Length: 253..Remote-Party-ID: "<BR>&nbsp; 1004" &lt;sip:1004@222.111.000.177&gt;;party=calling;privacy=off;screen=no....v=0..o=FreeSWITCH 1272949011 1272949012 IN IP4 2<BR>&nbsp; 04.126.000.177..s=FreeSWITCH..c=IN IP4 222.111.000.177..t=0 0..m=audio 26072 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpm<BR>&nbsp; ap:101 telephone-event/8000..a=fmtp:101 0-16..a=silenceSupp:off - - - -..a=ptime:20..<BR>#<BR>U 222.111.000.102:51986 -&gt; 222.111.000.177:5060<BR>&nbsp; SIP/2.0 200 OK..Via: SIP/2.0/UDP 222.111.000.177;rport;branch=z9hG4bKB5vj0Sm350B9r..From: "Line2" &lt;sip:1008@222.111.000.<BR>&nbsp; 177&gt;;tag=9BNeN21mSySQN..To: &lt;sip:1004@222.111.000.102:5060;transport=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..Call-ID<BR>&nbsp; : ff905261-d218-122d-9ab7-6d55cd3bb1e9..Date: Tue, 04 May 2010 12:17:13 GMT..CSeq: 130369205 INVITE..Server: Cisco-CP796<BR>&nbsp; 0G/8.0..Contact: &lt;sip:1004@222.111.000.102:5060;transport=udp&gt;..Allow: ACK,BYE,CANCEL,INVITE,NOTIFY,OPTIONS,REFER,REGIST<BR>&nbsp; ER,UPDATE..Supported: replaces,join,norefersub..Content-Length: 210..Content-Type: application/sdp..Content-Disposition:<BR>&nbsp;&nbsp; session;handling=optional....v=0..o=Cisco-SIPUA 5247 0 IN IP4 222.111.000.102..s=SIP Call..t=0 0..m=audio 18454 RTP/AVP<BR>&nbsp;&nbsp; 0 101..c=IN IP4 222.111.000.102..a=rtpmap:0 PCMU/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101 0-15..a=sendrecv..<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.102:5060<BR>&nbsp; ACK sip:1004@222.111.000.102:5060;transport=udp SIP/2.0..Via: SIP/2.0/UDP 222.111.000.177;rport;branch=z9hG4bKcepB2m5629<BR>&nbsp; 1Um..Max-Forwards: 70..From: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=9BNeN21mSySQN..To: &lt;sip:1004@222.111.000.102:5060;tr<BR>&nbsp; ansport=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..Call-ID: ff905261-d218-122d-9ab7-6d55cd3bb1e9..CSeq: 130369205 ACK..<BR>&nbsp; Contact: &lt;sip:mod_sofia@222.111.000.177:5060&gt;..Content-Length: 0....<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.144:5060<BR>&nbsp; SIP/2.0 200 OK..Via: SIP/2.0/UDP 222.111.000.144:5060;branch=z9hG4bK43506416..From: "Line2" &lt;sip:1008@222.111.000.177&gt;;t<BR>&nbsp; ag=00082166efcb01396b803ac6-7e5ae7dc..To: &lt;sip:1004@222.111.000.177;user=phone&gt;;tag=82UNK7gHvN34S..Call-ID: 00082166-efc<BR>&nbsp; <A href="mailto:b0019-398a09d5-5e799be0@222.111.000.144..CSeq">b0019-398a09d5-5e799be0@222.111.000.144..CSeq</A>: 101 INVITE..Contact: &lt;sip:1004@222.111.000.177:5060;transport=udp&gt;..User-<BR>&nbsp; Agent: FreeSWITCH-mod_sofia/1.0.6-svn-exported..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTE<BR>&nbsp; R, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: timer, precondition, path, replaces..Allow-Events: talk, presence, dial<BR>&nbsp; og, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer..Content-Type: appli<BR>&nbsp; cation/sdp..Content-Disposition: session..Content-Length: 253..Remote-Party-ID: "1004" &lt;sip:1004@222.111.000.177&gt;;party=<BR>&nbsp; calling;privacy=off;screen=no....v=0..o=FreeSWITCH 1272949011 1272949012 IN IP4 222.111.000.177..s=FreeSWITCH..c=IN IP4<BR>&nbsp; 222.111.000.177..t=0 0..m=audio 26072 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101<BR>&nbsp;&nbsp; 0-16..a=silenceSupp:off - - - -..a=ptime:20..<BR>#<BR>U 222.111.000.144:50746 -&gt; 222.111.000.177:5060<BR>&nbsp; ACK sip:1004@222.111.000.177:5060;transport=udp SIP/2.0..Via: SIP/2.0/UDP 222.111.000.144:5060;branch=z9hG4bK27a3b7e3..F<BR>&nbsp; rom: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=00082166efcb01396b803ac6-7e5ae7dc..To: &lt;sip:1004@222.111.000.177;user=phone&gt;<BR>&nbsp; ;tag=82UNK7gHvN34S..Call-ID: <A href="mailto:00082166-efcb0019-398a09d5-5e799be0@222.111.000.144..Max-Forwards">00082166-efcb0019-398a09d5-5e799be0@222.111.000.144..Max-Forwards</A>: 70..Date: Tue, 04 May 20<BR>&nbsp; 10 12:17:14 GMT..CSeq: 101 ACK..User-Agent: Cisco-CP7960G/8.0..Content-Length: 0....<BR>#<BR>U 222.111.000.102:51018 -&gt; 222.111.000.177:5060<BR>&nbsp; INVITE sip:mod_sofia@222.111.000.177:5060 SIP/2.0..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK6e75964a..From: &lt;<BR>&nbsp; sip:1004@222.111.000.102:5060;transport=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.17<BR>&nbsp; 7&gt;;tag=9BNeN21mSySQN..Call-ID: ff905261-d218-122d-9ab7-6d55cd3bb1e9..Max-Forwards: 70..Date: Tue, 04 May 2010 12:17:15 G<BR>&nbsp; MT..CSeq: 101 INVITE..User-Agent: Cisco-CP7960G/8.0..Contact: &lt;sip:1004@222.111.000.102:5060;transport=udp&gt;..Accept: app<BR>&nbsp; lication/sdp..Allow: ACK,BYE,CANCEL,INVITE,NOTIFY,OPTIONS,REFER,REGISTER,UPDATE..Supported: replaces,join,norefersub..Co<BR>&nbsp; ntent-Length: 281..Content-Type: application/sdp..Content-Disposition: session;handling=optional....v=0..o=Cisco-SIPUA 5<BR>&nbsp; 247 1 IN IP4 222.111.000.102..s=SIP Call..t=0 0..m=audio 18454 RTP/AVP 0 8 18 101..c=IN IP4 222.111.000.102..a=rtpmap:0<BR>&nbsp; PCMU/8000..a=rtpmap:8 PCMA/8000..a=rtpmap:18 G729/8000..a=fmtp:18 annexb=no..a=rtpmap:101 telephone-event/8000..a=fmtp:1<BR>&nbsp; 01 0-15..a=sendonly..<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.102:5060<BR>&nbsp; SIP/2.0 100 Trying..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK6e75964a..From: &lt;sip:1004@222.111.000.102:5060;t<BR>&nbsp; ransport=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=9BNeN21mSySQN..Call-ID:<BR>&nbsp; ff905261-d218-122d-9ab7-6d55cd3bb1e9..CSeq: 101 INVITE..User-Agent: FreeSWITCH-mod_sofia/1.0.6-svn-exported..Content-Len<BR>&nbsp; gth: 0....<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.102:5060<BR>&nbsp; SIP/2.0 200 OK..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK6e75964a..From: &lt;sip:1004@222.111.000.102:5060;trans<BR>&nbsp; port=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=9BNeN21mSySQN..Call-ID: ff90<BR>&nbsp; 5261-d218-122d-9ab7-6d55cd3bb1e9..CSeq: 101 INVITE..Contact: &lt;sip:mod_sofia@222.111.000.177:5060&gt;..User-Agent: FreeSWITC<BR>&nbsp; H-mod_sofia/1.0.6-svn-exported..Accept: application/sdp..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO<BR>&nbsp; , REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: timer, precondition, path, replaces..Content-Type: application<BR>&nbsp; /sdp..Content-Disposition: session..Content-Length: 265....v=0..o=FreeSWITCH 1272956499 1272956501 IN IP4 222.111.000.17<BR>&nbsp; 7..s=FreeSWITCH..c=IN IP4 222.111.000.177..t=0 0..m=audio 18584 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:101 teleph<BR>&nbsp; one-event/8000..a=fmtp:101 0-16..a=recvonly..a=silenceSupp:off - - - -..a=ptime:20..<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.102:5060<BR>&nbsp; SIP/2.0 200 OK..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK6e75964a..From: &lt;sip:1004@222.111.000.102:5060;trans<BR>&nbsp; port=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=9BNeN21mSySQN..Call-ID: ff90<BR>&nbsp; 5261-d218-122d-9ab7-6d55cd3bb1e9..CSeq: 101 INVITE..Contact: &lt;sip:mod_sofia@222.111.000.177:5060&gt;..User-Agent: FreeSWITC<BR>&nbsp; H-mod_sofia/1.0.6-svn-exported..Accept: application/sdp..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO<BR>&nbsp; , REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: timer, precondition, path, replaces..Content-Type: application<BR>&nbsp; /sdp..Content-Disposition: session..Content-Length: 265....v=0..o=FreeSWITCH 1272956499 1272956501 IN IP4 222.111.000.17<BR>&nbsp; 7..s=FreeSWITCH..c=IN IP4 222.111.000.177..t=0 0..m=audio 18584 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:101 teleph<BR>&nbsp; one-event/8000..a=fmtp:101 0-16..a=recvonly..a=silenceSupp:off - - - -..a=ptime:20..<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.102:5060<BR>&nbsp; SIP/2.0 200 OK..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK6e75964a..From: &lt;sip:1004@222.111.000.102:5060;trans<BR>&nbsp; port=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=9BNeN21mSySQN..Call-ID: ff90<BR>&nbsp; 5261-d218-122d-9ab7-6d55cd3bb1e9..CSeq: 101 INVITE..Contact: &lt;sip:mod_sofia@222.111.000.177:5060&gt;..User-Agent: FreeSWITC<BR>&nbsp; H-mod_sofia/1.0.6-svn-exported..Accept: application/sdp..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO<BR>&nbsp; , REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: timer, precondition, path, replaces..Content-Type: application<BR>&nbsp; /sdp..Content-Disposition: session..Content-Length: 265....v=0..o=FreeSWITCH 1272956499 1272956501 IN IP4 222.111.000.17<BR>&nbsp; 7..s=FreeSWITCH..c=IN IP4 222.111.000.177..t=0 0..m=audio 18584 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:101 teleph<BR>&nbsp; one-event/8000..a=fmtp:101 0-16..a=recvonly..a=silenceSupp:off - - - -..a=ptime:20..<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.102:5060<BR>&nbsp; SIP/2.0 200 OK..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK6e75964a..From: &lt;sip:1004@222.111.000.102:5060;trans<BR>&nbsp; port=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=9BNeN21mSySQN..Call-ID: ff90<BR>&nbsp; 5261-d218-122d-9ab7-6d55cd3bb1e9..CSeq: 101 INVITE..Contact: &lt;sip:mod_sofia@222.111.000.177:5060&gt;..User-Agent: FreeSWITC<BR>&nbsp; H-mod_sofia/1.0.6-svn-exported..Accept: application/sdp..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO<BR>&nbsp; , REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: timer, precondition, path, replaces..Content-Type: application<BR>&nbsp; /sdp..Content-Disposition: session..Content-Length: 265....v=0..o=FreeSWITCH 1272956499 1272956501 IN IP4 222.111.000.17<BR>&nbsp; 7..s=FreeSWITCH..c=IN IP4 222.111.000.177..t=0 0..m=audio 18584 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:101 teleph<BR>&nbsp; one-event/8000..a=fmtp:101 0-16..a=recvonly..a=silenceSupp:off - - - -..a=ptime:20..<BR>#<BR>U 222.111.000.102:51018 -&gt; 222.111.000.177:5060<BR>&nbsp; INVITE sip:mod_sofia@222.111.000.177:5060 SIP/2.0..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK2c3b4977..From: &lt;<BR>&nbsp; sip:1004@222.111.000.102:5060;transport=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.17<BR>&nbsp; 7&gt;;tag=9BNeN21mSySQN..Call-ID: ff905261-d218-122d-9ab7-6d55cd3bb1e9..Max-Forwards: 70..Date: Tue, 04 May 2010 12:17:22 G<BR>&nbsp; MT..CSeq: 102 INVITE..User-Agent: Cisco-CP7960G/8.0..Contact: &lt;sip:1004@222.111.000.102:5060;transport=udp&gt;..Accept: app<BR>&nbsp; lication/sdp..Allow: ACK,BYE,CANCEL,INVITE,NOTIFY,OPTIONS,REFER,REGISTER,UPDATE..Supported: replaces,join,norefersub..Co<BR>&nbsp; ntent-Length: 281..Content-Type: application/sdp..Content-Disposition: session;handling=optional....v=0..o=Cisco-SIPUA 5<BR>&nbsp; 247 2 IN IP4 222.111.000.102..s=SIP Call..t=0 0..m=audio 18454 RTP/AVP 0 8 18 101..c=IN IP4 222.111.000.102..a=rtpmap:0<BR>&nbsp; PCMU/8000..a=rtpmap:8 PCMA/8000..a=rtpmap:18 G729/8000..a=fmtp:18 annexb=no..a=rtpmap:101 telephone-event/8000..a=fmtp:1<BR>&nbsp; 01 0-15..a=sendrecv..<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.102:5060<BR>&nbsp; SIP/2.0 500 Overlapping Requests..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK2c3b4977..From: &lt;sip:1004@222.111.<BR>&nbsp; 120.102:5060;transport=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=9BNeN21mSy<BR>&nbsp; SQN..Call-ID: ff905261-d218-122d-9ab7-6d55cd3bb1e9..CSeq: 102 INVITE..Retry-After: 2 (Overlapping Requests)..User-Agent:<BR>&nbsp;&nbsp; FreeSWITCH-mod_sofia/1.0.6-svn-exported..Accept: application/sdp..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UP<BR>&nbsp; DATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: timer, precondition, path, replaces..Content-Length:<BR>&nbsp;&nbsp; 0....<BR>#<BR>U 222.111.000.102:51987 -&gt; 222.111.000.177:5060<BR>&nbsp; ACK sip:mod_sofia@222.111.000.177:5060 SIP/2.0..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK2c3b4977..From: &lt;sip<BR>&nbsp; :1004@222.111.000.102:5060;transport=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;<BR>&nbsp; tag=9BNeN21mSySQN..Call-ID: ff905261-d218-122d-9ab7-6d55cd3bb1e9..Date: Tue, 04 May 2010 12:17:23 GMT..CSeq: 102 ACK..Co<BR>&nbsp; ntent-Length: 0....<BR>#<BR>U 222.111.000.102:51018 -&gt; 222.111.000.177:5060<BR>&nbsp; BYE sip:mod_sofia@222.111.000.177:5060 SIP/2.0..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK7102f98b..From: &lt;sip<BR>&nbsp; :1004@222.111.000.102:5060;transport=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;<BR>&nbsp; tag=9BNeN21mSySQN..Call-ID: ff905261-d218-122d-9ab7-6d55cd3bb1e9..Max-Forwards: 70..Date: Tue, 04 May 2010 12:17:23 GMT.<BR>&nbsp; .CSeq: 103 BYE..User-Agent: Cisco-CP7960G/8.0..Content-Length: 0....<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.102:5060<BR>&nbsp; SIP/2.0 200 OK..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK7102f98b..From: &lt;sip:1004@222.111.000.102:5060;trans<BR>&nbsp; port=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=9BNeN21mSySQN..Call-ID: ff90<BR>&nbsp; 5261-d218-122d-9ab7-6d55cd3bb1e9..CSeq: 103 BYE..User-Agent: FreeSWITCH-mod_sofia/1.0.6-svn-exported..Allow: INVITE, ACK<BR>&nbsp; , BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: timer, preconditi<BR>&nbsp; on, path, replaces..Content-Length: 0....<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.144:5060<BR>&nbsp; BYE sip:1008@222.111.000.144:5060;transport=udp SIP/2.0..Via: SIP/2.0/UDP 222.111.000.177;rport;branch=z9hG4bKDQF43Fpa0j<BR>&nbsp; reg..Max-Forwards: 70..From: &lt;sip:1004@222.111.000.177;user=phone&gt;;tag=82UNK7gHvN34S..To: "Line2" &lt;sip:1008@222.111.000.<BR>&nbsp; 177&gt;;tag=00082166efcb01396b803ac6-7e5ae7dc..Call-ID: <A href="mailto:00082166-efcb0019-398a09d5-5e799be0@222.111.000.144..CSeq">00082166-efcb0019-398a09d5-5e799be0@222.111.000.144..CSeq</A>: 13036921<BR>&nbsp; 1 BYE..Contact: &lt;sip:1004@222.111.000.177:5060;transport=udp&gt;..User-Agent: FreeSWITCH-mod_sofia/1.0.6-svn-exported..Allo<BR>&nbsp; w: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: tim<BR>&nbsp; er, precondition, path, replaces..Reason: Q.850;cause=16;text="NORMAL_CLEARING"..Content-Length: 0....<BR>#<BR>U 222.111.000.144:50747 -&gt; 222.111.000.177:5060<BR>&nbsp; SIP/2.0 200 OK..Via: SIP/2.0/UDP 222.111.000.177;rport;branch=z9hG4bKDQF43Fpa0jreg..From: &lt;sip:1004@222.111.000.177;user<BR>&nbsp; =phone&gt;;tag=82UNK7gHvN34S..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=00082166efcb01396b803ac6-7e5ae7dc..Call-ID: 000821<BR>&nbsp; <A href="mailto:66-efcb0019-398a09d5-5e799be0@222.111.000.144..Date">66-efcb0019-398a09d5-5e799be0@222.111.000.144..Date</A>: Tue, 04 May 2010 12:17:24 GMT..CSeq: 130369211 BYE..Server: Cisco-C<BR>&nbsp; P7960G/8.0..Content-Length: 0....<BR>#<BR>U 222.111.000.177:5060 -&gt; 222.111.000.102:5060<BR>&nbsp; SIP/2.0 200 OK..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK6e75964a..From: &lt;sip:1004@222.111.000.102:5060;trans<BR>&nbsp; port=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;tag=9BNeN21mSySQN..Call-ID: ff90<BR>&nbsp; 5261-d218-122d-9ab7-6d55cd3bb1e9..CSeq: 101 INVITE..Contact: &lt;sip:mod_sofia@222.111.000.177:5060&gt;..User-Agent: FreeSWITC<BR>&nbsp; H-mod_sofia/1.0.6-svn-exported..Accept: application/sdp..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO<BR>&nbsp; , REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE..Supported: timer, precondition, path, replaces..Content-Type: application<BR>&nbsp; /sdp..Content-Disposition: session..Content-Length: 265....v=0..o=FreeSWITCH 1272956499 1272956501 IN IP4 222.111.000.17<BR>&nbsp; 7..s=FreeSWITCH..c=IN IP4 222.111.000.177..t=0 0..m=audio 18584 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:101 teleph<BR>&nbsp; one-event/8000..a=fmtp:101 0-16..a=recvonly..a=silenceSupp:off - - - -..a=ptime:20..<BR>#<BR>U 222.111.000.102:51988 -&gt; 222.111.000.177:5060<BR>&nbsp; ACK sip:mod_sofia@222.111.000.177:5060 SIP/2.0..Via: SIP/2.0/UDP 222.111.000.102:5060;branch=z9hG4bK2c87fac1..From: &lt;sip<BR>&nbsp; :1004@222.111.000.102:5060;transport=udp&gt;;tag=000821969c8a01964ef2e695-368dc57b..To: "Line2" &lt;sip:1008@222.111.000.177&gt;;<BR>&nbsp; tag=9BNeN21mSySQN..Call-ID: ff905261-d218-122d-9ab7-6d55cd3bb1e9..Max-Forwards: 70..Date: Tue, 04 May 2010 12:17:16 GMT.<BR>&nbsp; .CSeq: 101 ACK..User-Agent: Cisco-CP7960G/8.0..Content-Length: 0....<BR>exit<BR>25 received, 0 dropped<BR></DIV>