XONTEL Plus PBX, User Manual

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Progress Timeout(s)
If the parameter is set as 50 seconds, it means that the call will be considered
as timeout in case that no one answers the call during 50 seconds.
DTMF Type
DTMF is short for Dual Tone Multi Frequency
There are three DTMF modes, including SIP Info, INBAND, RFC2833
RFC2833-PT
RFC2833
payload coding
Process DTMF as
Hold/Unhold
By default, this parameter is off.
When it is set as on, DTMF will be addressed as call hold/unhold.
PRACK
Provisional Response ACKnowledgement
Session Timer
Session Expires : The validity period of a SIP session. When a SIP session
times out, an invite message needs to be sent to refresh the session,
otherwise, the session ends;
It is 1800 seconds by default
Min Session Expires : the minimum validity period to respond to a SIP
session.
Session Refresh Method : re-INVITE or UPDATE
Caller Number
Source
From: User Part : to obtain the caller number from the user part contained in
the ‘From’ field.
From: Display Name : to obtain the caller number from the display name
contained in the ‘From’ field.
To: User Part : to obtain the caller number from the user part contained in the
‘To’ field.
Contact: User Part : to obtain the caller number from the user part contained
in the ‘Contact’ field.
Called Number
Source
From: User Part : to obtain the called number from the user part contained in
the ‘From’ field.
From: Display Name : to obtain the called number from the display name
contained in the ‘From’ field.
To: User Part : to obtain the called number from the user part contained in
the ‘To’ field.
Contact: User Part : to obtain the called number from the user part contained
in the ‘Contact’ field.
Inbound Codec
Negotiation Priority
To take the remote device or the local device as priority for inbound codec
negotiation
Assume local device supports PCMA, PCMU, G.729 and G.723, while the
remote device supports G.723 and G.729
If remote device is taken as codec negotiation priority, G.723 will be the
codec mode, since the remote device supports G.723 and G.729 and G.723 is
prior to G.729