DTMF mode for all IP extensions and SIP trunks in the
IPBX, as well as for all IP phones registered to the IPBX. If
it is not feasible to set the same DTMF mode for some IP
extensions or SIP trunks, and inline transfer or 2nd-dialing
is necessary for those IP extensions or SIP trunks, the Fast
Bridging feature can be disabled on a per IP extension and
per SIP trunk basis. Note that Fast Bridging is enabled by
default.
Advanced Settings
Select to see more settings shown below.
DTMF Mode
Select a preferred DTMF mode, Inband, RFC 2833 or SIP INFO,
for this trunk in the list. This must match configuration on the
server side. If the user does not know the DTMF mode on the
server side, select Auto from the list, and IP PBX will
automatically detect the DTMF mode on this SIP trunk is Inband
or RFC2833.
Try Peer-to-peer RTP
Click NO to disable or IP PBX will attempt to notify the two peers
in a conversation to try peer-to-peer RTP transmission. This is
suggested as long as phone and ITSP side support re-INVITE or
UPDATE method during a connected call to save the resource of
IP PBX. However, only SIP INFO DTMF mode should enable this
since other DTMF modes require IP PBX being RTP relay server
to support in-line transfer.
User Agent
Override default User-Agent header content.
From Caller ID
Send the entered number as Caller ID.
Bandwidth Sensitive
Click Bandwidth Sensitive and specify a limit of bandwidth in
kbps for call admission in Bandwidth Limitation.
Bandwidth Limitation
(kbps)
Call Admission Control
Select to enable the limitation of concurrent calls for a SIP trunk.
Allow
<number>
Concurrent Call(s)
Select Call Admission Control and enter a number for allowed
concurrent calls.
Enable ENUM Resolution
Select to use ENUM resolution, or leave it as blank.
Clear Bindings Prior
Registration
If failed to the registration and cannot identify any abnormal
settings, select to un-register before registering again.
Anti-SIP Blocking
Select to ignore illegitimately inserted CANCEL messages from
ISP.
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