Phone to SIP Phone via Gateway: Call Screening

Header:

Via: SIP/2.0/UDP 192.168.26.180:5060;branch=2

Header:

Via: SIP/2.0/UDP 192.168.26.11:5060

Header:

From: <sip:6715@192.168.26.11:5060>

Header:

To: <sip:6711@192.168.26.180:5060>

 

Header:

Call-ID: c3943000-6978b-2995c-2e323931@192.168.26.11

Header:

CSeq: 100 INVITE

 

Header:

Proxy-Authorization: Basic 123

 

Header:

Expires: 180

 

Header:

Record-Route: <sip:6711@192.168.26.180:5060;maddr=192.168.26.180>

Header:

Contact: <sip:6715@192.168.26.11:5060>

Header:

Content-Type: application/sdp

 

Header:

Content-Length: 220

 

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

 

SDP Headers

 

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

Header:

v=0

 

Header:

o=CiscoSystemsSIP-IPPhone-UserAgent 5311 17807 IN IP4 192.168.26.11

Header:

s=SIP Call

 

Header:

c=IN IP4 192.168.26.11

 

Header:

t=0 0

 

Header:

m=audio 23070 RTP/AVP 0 101

 

Header:

a=rtpmap:0 pcmu/8000

 

Header:

a=rtpmap:101 telephone-event/8000

 

Header:

a=fmtp:101 0-11

 

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

 

SIP Headers

 

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

sip-res:

SIP/2.0 302 Moved Temporarily [192.168.26.200:5060->192.168.26.220:6074]

Header:

Via: SIP/2.0/UDP 192.168.26.220:6074;branch=101

Header:

Via: SIP/2.0/UDP 192.168.26.180:5060;branch=2

Header:

Via: SIP/2.0/UDP 192.168.26.11:5060

Header:

From: <sip:6715@192.168.26.11:5060>

Header:

To: <sip:6711@192.168.26.180:5060>

 

Header:

Call-ID: c3943000-6978b-2995c-2e323931@192.168.26.11

Header:

CSeq: 100 INVITE

 

Header:

Contact: <sip:6711@192.168.26.220:6073;user=phone>

Header:

Content-Length: 0

 

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

 

SIP Headers

 

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

sip-req:

ACK sip:6711@192.168.26.200:5060;user=phone SIP/2.0 [192.168.26.220:6074-

>192.168.26.200:5060]

 

Header:

Via: SIP/2.0/UDP 192.168.26.220:6074;branch=101

Header:

From: <sip:6715@192.168.26.11:5060>

Header:

To: <sip:6711@192.168.26.180:5060>

 

Header:

Call-ID: c3943000-6978b-2995c-2e323931@192.168.26.11

Header:

CSeq: 100 ACK

 

Header:

Content-Length: 0

 

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

 

SIP Headers

 

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

sip-res:

SIP/2.0 403 Forbidden

[192.168.26.220:6074-

>192.168.26.180:5060]

 

Header:

Via: SIP/2.0/UDP 192.168.26.180:5060;branch=2

Header:

Via: SIP/2.0/UDP 192.168.26.11:5060

Header:

From: <sip:6715@192.168.26.11:5060>

Header:

To: <sip:6711@192.168.26.180:5060>

 

Header:

Call-ID: c3943000-6978b-2995c-2e323931@192.168.26.11

Header:

CSeq: 100 INVITE

 

Header:

Content-Length: 0

 

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

 

SIP Headers

 

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

sip-req:

ACK sip:6711@192.168.26.220:6074;user=phone SIP/2.0 [192.168.26.180:5060-

>192.168.26.220:6074]

 

Header:

Via: SIP/2.0/UDP 192.168.26.180:5060;branch=2

Header:

From: <sip:6715@192.168.26.11:5060>

Header:

To: <sip:6711@192.168.26.180:5060>

 

Header:

Call-ID: c3943000-6978b-2995c-2e323931@192.168.26.11

Header:

CSeq: 100 ACK

 

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Cisco Systems 1.3.0 manual Phone to SIP Phone via Gateway Call Screening