recv 598 bytes from udp/[10.0.1.67]:5060 at 20:48:20.589315:

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SUBSCRIBE sip:102@usgagasrv1.pts-hvac.com SIP/2.0

Via: SIP/2.0/UDP 10.0.1.67:5060;branch=z9hG4bK1880398731;rport

From: <sip:102@usgagasrv1.pts-hvac.com>;tag=1864547776

To: <sip:102@usgagasrv1.pts-hvac.com>

Call-ID: 1978847509-5060-4@BA.A.B.GH

CSeq: 30500 SUBSCRIBE

Contact: <sip:102@10.0.1.67:5060>

X-Grandstream-PBX: true

Max-Forwards: 70

User-Agent: Grandstream GXP2100 1.0.1.108

Expires: 3630

Supported: replaces, path, timer

Event: reg

Accept: application/reginfo+xml

Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE

Content-Length: 0

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send 462 bytes to udp/[10.0.1.67]:5060 at 20:48:20.590001:

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SIP/2.0 405 Method Not Allowed

Via: SIP/2.0/UDP 10.0.1.67:5060;branch=z9hG4bK1880398731;rport=5060

From: <sip:102@usgagasrv1.pts-hvac.com>;tag=1864547776

To: <sip:102@usgagasrv1.pts-hvac.com>;tag=XDmee5t4Nj3ae

Call-ID: 1978847509-5060-4@BA.A.B.GH

CSeq: 30500 SUBSCRIBE

User-Agent: Configured by 2600hz!

Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTER, REFER, NOTIFY

Supported: precondition, path, replaces

Content-Length: 0

------------------------------------------------------------------------