Compact Sip Header; Reject Inv Or Bye When Unsupported Value In Require Header - Mitel 6867i Administrator's Manual

Mitel 6800 Series SIP Phone Release 4.2.0 Administrator Guide
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" <sip:Unknown@10.50.91.2>;tag=as19d00fc8
To: <sip:1106@10.50.110.54:5060;transport=udp>;tag=916699998
Call-Id: 73cad5456806f3a7768d17e8617279d7@10.50.91.2
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" <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 Mitel 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"

REJECT INV OR BYE WHEN UNSUPPORTED VALUE IN REQUIRE
HEADER
The IP Phones support the following parameter:
• sip enforce require hdr
This parameter allows you to enable (1) or disable (0) the rejection of an INV or BYE with a
"420 Bad Extension" if the INV or BYE contains an unsupported value in the REQUIRE header.
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page A-284