I did, and this is what it gave me; not very helpful IMO:
v=0
o=UserA 3111945738 2810945690 IN IP4 0.0.0.0
s=Session SDP
c=IN IP4 0.0.0.0
t=0 0
m=audio 8000 RTP/AVP 0 18
a=rtpmap:0 PCMU/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
-01:232- >
-01:232- > -01:224- 16:41 11-29 *** SIP TX [''-'92003']: OPTIONS sip:montreal.voip.ms:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.60.75:5060;branch=z9hG4bK2987806275-915
Max-Forwards: 70
Allow: NOTIFY,REGISTER,REFER,SUBSCRIBE,INVITE,ACK,OPTIONS,CANCEL,BYE
User-Agent: Mitel-5000-ICP-6.0.9.67
P-Asserted-Identity: <sip:149760_mtl@192.168.60.75>
From: <sip:149760_mtl@192.168.60.75:5060>;tag=Mitel-5000_2987807005-915
To: sip:montreal.voip.ms:5060
Call-ID: 2987803275-915
CSeq: 1 OPTIONS
Contact: <sip:149760_mtl@192.168.60.75:5060>
Content-Length: 0
-01:232- >
-01:232- > -01:225- 16:41 11-29 *** SIP RX [''-'92003']: SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.60.75:5060;branch=z9hG4bK2987806275-915;received=205.237.45.113;rport=42628
From: <sip:149760_mtl@192.168.60.75:5060>;tag=Mitel-5000_2987807005-915
To: sip:montreal.voip.ms:5060;tag=as4ac02088
Call-ID: 2987803275-915
CSeq: 1 OPTIONS
Server: voip.ms
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
Contact: <sip:67.205.74.184:5060>
Accept: application/sdp
Content-Length: 0
-01:232- >
-01:232- > -01:226- 16:42 11-29 *** SIP TX [''-'92002']: OPTIONS sip:192.168.60.70:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.60.75:5060;branch=z9hG4bK3017704453-915
Max-Forwards: 70
Allow: NOTIFY,REGISTER,REFER,SUBSCRIBE,INVITE,ACK,OPTIONS,CANCEL,BYE
User-Agent: Mitel-5000-ICP-6.0.9.67
From: <sip:192.168.60.75:5060>;tag=Mitel-5000_3017705140-915
To: sip:192.168.60.70:5060
Call-ID: 3017702639-915
CSeq: 1 OPTIONS
Contact: <sip:192.168.60.75:5060>
Content-Length: 0
-01:232- >
-01:232- > -01:227- 16:42 11-29 *** SIP RX [''-'92002']: SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.60.75:5060;branch=z9hG4bK3017704453-915
From: <sip:192.168.60.75:5060>;tag=Mitel-5000_3017705140-915
Call-ID: 3017702639-915
CSeq: 1 OPTIONS
Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,INFO,REFER,NOTIFY,UPDATE
Supported: timer
Server: IP Office 9.0.0.0 build 829
To: <sip:192.168.60.70:5060>;tag=3d374b34e63ba269
Content-Type: application/sdp
Content-Length: 184
v=0
o=UserA 2416200034 2356709533 IN IP4 0.0.0.0
s=Session SDP
c=IN IP4 0.0.0.0
t=0 0
m=audio 8000 RTP/AVP 0 18
a=rtpmap:0 PCMU/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
-01:232- >
-01:232- > -01:228- 16:42 11-29 M3501 INF EG CP CP System Monitor Two Way Socket Thread Started From IP Address 192.168.60.117
-01:232- > -01:229- 16:42 11-29 *** SIP TX [''-'92003']: OPTIONS sip:montreal.voip.ms:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.60.75:5060;branch=z9hG4bK3047805749-915
Max-Forwards: 70
Allow: NOTIFY,REGISTER,REFER,SUBSCRIBE,INVITE,ACK,OPTIONS,CANCEL,BYE
User-Agent: Mitel-5000-ICP-6.0.9.67
P-Asserted-Identity: <sip:149760_mtl@192.168.60.75>
From: <sip:149760_mtl@192.168.60.75:5060>;tag=Mitel-5000_3047806487-915
To: sip:montreal.voip.ms:5060
Call-ID: 3047802801-915
CSeq: 1 OPTIONS
Contact: <sip:149760_mtl@192.168.60.75:5060>
Content-Length: 0
-01:232- >
-01:232- > -01:230- 16:42 11-29 *** SIP RX [''-'92003']: SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.60.75:5060;branch=z9hG4bK3047805749-915;received=205.237.45.113;rport=42628
From: <sip:149760_mtl@192.168.60.75:5060>;tag=Mitel-5000_3047806487-915
To: sip:montreal.voip.ms:5060;tag=as0600602a
Call-ID: 3047802801-915
CSeq: 1 OPTIONS
Server: voip.ms
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
Contact: <sip:67.205.74.184:5060>
Accept: application/sdp
Content-Length: 0
ACSS-SME