Planet Technology ISDN Internet Telephony PBX System IPX-1800N - Manual (Page 25)

PLANET IP PBX user’s manual
Field Description
PBX SIP Port Specify the UDP port where the SIP service listens on.
RTP Port Range
Limit the UDP ports used by the IP PBX for media
transport.
) The port range needs to have at least equals to the
(number of extensions (also count shared-lines) +
number of SIP trunks (also count trunk terminals)) *
2. If selecting Enable Video Codec, the total amount
needs to multiply by 2 to have the least requirements
for RTP port range.
Max/Default Expiration Time Guard and advertise SIP registration respectively.
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 Wireless Calls
Enter a number to limit the calls made by explicitly
specified wireless extensions.
IP TOS Value
Set the TOS value in the IP header of RTP packets
originated from IP PBX.
Disable WAN Bandwidth Saver
Select to disable attempts to use low-bit-rate codec
(G.729A or G.723.1) for remote parties.
Enable DNS SRV Resolution
Select to enable looking up IP of dynamic clients or trunks
by DNS Service records before their successful
registrations.