Administrator's Guide

Chapter 10. SIP Services
Select if the Telecommuting Module should remove these headers in 180 responses. The
recommended setting is to keep the headers.
Forward CANCEL Body
Normally, a CANCEL request does not contain a body. There are some systems which put
a body in these requests. As every SIP proxy generates a new CANCEL instead of just for-
warding the incoming request, any body in the incoming request is usually dropped. Select
here if the Telecommuting Module should forward any CANCEL body when the CANCEL
itself is forwarded.
Use CANCEL Body In ACK
Normally, a CANCEL request does not contain a body. There are some systems which put
a body in these requests. As every SIP proxy generates a new CANCEL instead of just
forwarding the incoming request, any body in the incoming request is usually dropped.
For INVITE requests, an ACK is always required. Some systems require that the body from
the CANCEL should also be used in the ACK. Select here if the Telecommuting Module
should use the CANCEL body in the ACK.
Preserve RFC 2543 Hold
sendonly streams are defined differently in RFC 2543 and RFC 3264. The Telecommuting
Module uses the RFC 3264 way, and converts SDPs when the old behaviour is seen. In
particular, the c= line is modified, as was not defined in RFC 2543. Some clients aren’t
updated to RFC 3264 yet and will not understand what happens.
When Use RFC 3264 Hold is selected, the c= line with address 0.0.0.0 will be rewritten.
When Use RFC 2543 Hold is selected, the c= line with address 0.0.0.0 will be left unmodi-
fied.
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