Codec
, the total amount needs to multiply by 2 to
have the least requirements for RTP port range.
Insufficient range of ports may cause call blocking
due to port depletion.
Max/Default Expiration Time
Guard and advertise SIP registration respectively, e.g.600
seconds.
PBX Caller ID
The default Caller ID for an unknown incoming call.
Enable Video Codec
Select if there will be video clients registering to the
system
Support Devices Multiplex Call-ID
Select to force discrimination of SIP tags. Do this only
when there is such a client device in the system and other
devices supporting the same. Otherwise, one may find the
special device only got registered with this option but
other clients or even SIP trunks fail due to such change.
Clear the box if you are not sure.
Max Active Users
Enter a number for registration admission control to limit
the maximum number of active registered clients.
Max Active Calls
Enter a number for call admission control to limit the
maximum number of concurrent calls.
MAX CDR Size
Enter maximum space in KBytes available for CDR.
IP TOS Value
Set the TOS value in the IP header of RTP packets
originated from IP PBX.
Call Keep Alive
Enter a time in seconds to periodically confirm the call is
still connected. The time is between 10 and 180 seconds.
Registered Keep Alive
Enter a time in seconds to confirm the registration status
periodically. The time is between 10 and 180 seconds.
NAT Traversal Keep Alive
Enter a time in seconds to retain NAT hole punched
periodically. The time is between 10 and 180 seconds.
Default NAT Traversal Mode
IP PBX uses NAT traversal for outgoing traffic by default.
Select to
Disable
NAT traversal if media ports in SDP are
trusted.
Disable WAN Bandwidth Saver
Select to disable attempts to use low-bit-rate codec
(G.729A or G.723.1) for remote parties.
Disable DSP saver for LAN calls
Select to honor the preferred codec of caller’s phone
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