2N NetSpeaker Complete Manual page 34

SIP Parameters
Figure: Advanced VoIP Settings
Always mediate RTP – enable this parameter to route the RTP stream via the
PBX VoIP card in all cases. Otherwise, the RTP stream might be routed outside
the PBX (for VoIP – VoIP connections) and the PBX processes only signalling for
such a call.
Reverse RTP negotiation – tick off this option to set the codec negotiating
method. If you do not tick off this option, the PBX offers codecs in the INVITE
message.
Use short headers – tick off this option to use abbreviated header items for
outgoing SIP packets. Example: From = f, To = t, Via = v. This optimisation
helps minimise data to be transmitted.
Do not replace +,#,* in numbers – if you do not tick off this option, the above
mentioned characters will be replaced with adequate strings %xx in numbers.
Tick off the option to send the characters.
Route by To header – if you tick off the option, incoming call routing on the
port will obey the To header setting. Otherwise (and by default!), calls are
routed by the Request URI header .
Dedicated Registrar – is used for the gateway only and helps route registration
to another server.
Address – IP address of the selected Registrar server.
Port – port of the selected Registrar server.
Scheme – set the sip or tel scheme in the "To" and "From" headers of the SIP.
tel is used for networks based on the numbering plan according to
recommendation E.164.
Min. MTU – set the minimum packet length for obligatory use of TCP in the
34
®
2N TELEKOMUNIKACE a.s., www.2n.cz