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Appendix C SIP Call Flows
Call Flow Scenarios for Successful Calls
C-20
Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
OL-4277-01
4.
ACK sip:9314@cisco.com;user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.2.163:5060;received=192.168.2.163
From: <sip:9313@cisco.com;user=phone>;tag=3907367229
To: <sip:9314@cisco.com;user=phone>;tag=4d241cc8-1145efd4
Call-ID: 2765277948@192.168.2.163
CSeq: 1 ACK
User-Agent: Cisco-CP7905/1.01-030429A
Content-Length: 0
5.
INVITE sip:9314@cisco.com;user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.2.163:5060
From: <sip:9313@cisco.com;user=phone>;tag=3907367229
To: <sip:9314@cisco.com;user=phone>
Call-ID: 2765277948@192.168.2.163
CSeq: 2 INVITE
Contact: <sip:9313@192.168.2.163:5060;user=phone;transport=udp>
User-Agent: Cisco-CP7905/1.01-030429A
Allow: ACK, BYE, CANCEL, INVITE, NOTIFY, OPTIONS, REFER, REGISTER
Proxy-Authorization: Digest
username="9313",realm="CISCO",nonce="3eb1be0a",uri="sip:9314@cisco.com",response
="40190e28f6f098437e4a7edcd73c4ce6"
Expires: 300
Content-Length: 257
Content-Type: application/sdp
v=0
o=9313 8749 8749 IN IP4 192.168.2.163
s=Cisco 7905 SIP Call
c=IN IP4 192.168.2.163
t=0 0
m=audio 16384 RTP/AVP 0 18 8 101
a=rtpmap:0 PCMU/8000/1
a=rtpmap:18 G729/8000/1
a=rtpmap:8 PCMA/8000/1
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
6.
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.2.163:5060;received=192.168.2.163
Call-ID: 2765277948@192.168.2.163
From: <sip:9313@cisco.com;user=phone>;tag=3907367229
To: <sip:9314@cisco.com;user=phone>
CSeq: 2 INVITE
Content-Length: 0
Table C-8 Log Listing (continued)