HP VCX Software manual Interoperability, Loose Routing, Relaxed Refer-To

Chapter 10. SIP Services

Save

Saves the Basic Settings configuration to the preliminary configuration.

Cancel

Clears and resets all fields in new rows and resets changes in old rows.

Interoperability

The SIP standard is still young and under considerable development. As an effect, several implementations of the standard omits parts of it, or makes guesses as to what will be ac- cepted.

3Com VCX IP Telecommuting Module adheres rather well to the standard (RFC 3261) per default, but you can also adjust the configuration to make more allowing for known issues in various SIP implementations.

Loose Routing

The Telecommuting Module uses the parameter "lr" in its SIP signaling to announce to other SIP devices that it uses loose routing. 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 these implementations, too. This could affect its interaction with other SIP devices that conform to the SIP standard very strictly.

Select to use lr or lr=true.

Relaxed Refer-To

The SIP 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.

Select whether the Telecommuting Module should accept Refer-To headers without angle brackets, but containing question marks. The recommended setting is Only allow Refer-To "?" with angle brackets.

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