Aastra 675xi Series Release Note page 9

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" <sip:Unknown@10.50.91.2>;tag=as19d00fc8
t: <sip:1106@10.50.110.54:5060;transport=udp>;tag=916699998
i: 73cad5456806f3a7768d17e8617279d7@10.50.91.2
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
To enable/disable compact sip headers use the following configuration parameter:
• sip compact headers
Parameter –
sip compact headers
Description
Format
Default Value
Range
Example
RN-001029-03, Release 2.4.1, Rev 01
SIP IP Phone Models 9143i, 9480i, 9480i CT, and 675xi Series Phones Release Note 2.4.1
Configuration Files
Enables or disables the IP phones to use compact SIP headers in the
SIP packets sent from the phone.
Boolean
0 (disabled- uses long SIP header format)
0 (disabled- uses long SIP header format)
1 (enabled- uses short (compact) SIP header format)
sip compact headers: 1
New Features in Release 2.4.1
aastra.cfg, <mac>.cfg
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