Aastra Telecom 41-001343-02 manual Configurable Route Header in SIP Packet

Advanced Operational Features

Configurable Route Header in SIP Packet

The IP Phones support the following parameter:

•sip remove route

This parameter enables or disables the addition of the Route header in a SIP packet. Enable this parameter for outbound proxies that do not support Route headers.

Note:

When enabled this will break all support for SIP routing, so if some other device in the network attempts to add itself to the route it will fail.

Enabling/Disabling the Route Header in the SIP Packet

Use the following procedure to enable/disable the addition of the Route header in the SIP packet.

Configuration Files

For the specific parameter you can set in the configuration files, see Appendix A, the section, “Route Header in SIP Packet” on page A-213.

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 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-213.

Reject INV or BYE when Unsupported Value in REQUIRE Header

The IP Phones support the following parameter:

•sip enforce require hdr

41-001343-02 REV04 – 05.2014 6-33