AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 677)

6-50 41-001343-01 Rev 03, Release 3.2.2
Configurable Compact SIP Header
The phones provide a feature that allows an Administrator to shorten the length of a SIP packet
by using the compact form. This feature is in accordance with Compact SIP Headers defined in
RFC 3261.
For example, the following SIP header is the long format:
Via: SIP/2.0/UDP
10.50.91.2:5060;branch=z9hG4bK571ebe0c;rport=5060;received=10.50.91.2
From: "Unknown" [email protected]>;tag=as19d00fc8
To: [email protected]:5060;transport=udp>;tag=916699998
Call-Id: [email protected]
CSeq: 102 OPTIONS
The following SIP header is equivalent to the above SIP header, but uses the short (compact)
format instead:
v: SIP/2.0/UDP
10.50.91.2:5060;branch=z9hG4bK571ebe0c;rport=5060;received=10.50.91.2
f: "Unknown" [email protected]>;tag=as19d00fc8
t: [email protected]:5060;transport=udp>;tag=916699998
i: [email protected]
CSeq: 102 OPTIONS
By default, the IP Phones use the long format. However, an Administrator can provision the
short (compact) format using the configuration files. The Aastra Web UI does not support this
configuration feature.
Enabling/Disabling the Compact SIP Headers Feature
Use the following procedure to enable/disable the Compact SIP Header in the SIP packet.
Configuration Files
For the specific parameter you can set in the configuration files, see Appendix A, the section, “Compact SIP
Header” on page A-249.