Chapter8. SIP Services

Log class for SIP signaling

Foreach SIP packet, the Telecommuting Module generates a message, containing the sender and receiver of the
packetand what type of packet it is. Select a log class for these log messages.

Log class for SIP packets

TheTelecommuting Module logs all SIP packets (one SIP packet is many lines). Select a log class for the SIP
packets.

Log class for SIP debug messages

TheTelecommuting Module logs a lot of status messages, for example the SIP initiation phase of a reboot. Select a
logclass for these messages.
Save
Savesthe Basic configuration to the preliminary configuration.
Cancel
Clearsand resets all fields in new rows and resets changes in old rows.
Interoperability
TheSIP standard is still young and under considerable development. As an effect, several implementations of the
standardomits parts of it, or makes guesses as to what will be accepted.
3ComVCX IP Telecommuting Module adheres rather well to the standard (RFC 3261) per default, but you can also
adjustthe configuration to make more allowing for known issues in various SIP implementations.
Onthis page, you also configure timeout and retransmission values for SIP signaling.

Loose routing

TheTelecommuting Module uses the parameter "lr" in its SIP signaling to announce to other SIP devices that it uses
looserouting. Some other SIP implementations incorrectly expect the lr parameter to be followed by a value, i.e.
"lr=true".If you select that the Telecommuting Module should add this value to its SIP signaling, it will work with
theseimplementations, too. This could affect its interaction with other SIP devices that conform to the SIP standard
verystrictly.
Selectto use lr or lr=true.

Relaxed Refer-To

TheSIP standard requires that a Refer-To header with a question mark in it must be contained within angle
brackets.Some clients do not honor this.
71