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Appendix
117
Parameter
Permitted
Values
Descriptions Web Setting Path
The default value is 1.
sip.rfc2543_hold 0 or 1
It enables or disables the IP phone to use RFC
2543 (c=0.0.0.0) outgoing hold signaling.
0-Disabled
1-Enabled
If it is set to 0 (Disabled), SDP media direction
attributes (such as a=sendonly) per RFC 3264
is used when placing a call on hold.
If it is set to 1 (Enabled), SDP media
connection address c=0.0.0.0 per RFC 2543 is
used when placing a call on hold.
The default value is 0.
Features->General Information->RFC
2543 Hold
sip.use_out_bound_in_dialog 0 or 1
It enables or disables the IP phone to keep
sending SIP requests to the outbound proxy
server in a dialog.
0-Disabled
1-Enabled
If it is set to 1 (Enabled), all the SIP request
messages from the IP phone will be forced to
send to the outbound proxy server in a
Features->General Information->Use
Outbound Proxy In Dialog