Grandstream GXV3240 Administration Guide - Manual (Page 71)

Firmware Version 1.0.3.37 GXV3240 Administration Guide Page 69 of 117
ADVANCED SETTINGS PAGE DEFINATIONS
ADVANCED SETTINGS/GENERAL SETTINGS
Local RTP Port
It is used to define the local RTP-RTCP port pair used to listen and
transmit.
If it is configured with X, in channel 0 the port X will be used for audio
RTP message, the port X+1 for audio RTCP message, the port X+2 for
video RTP message and the port X+3 for video RTCP. In Channel 1,
the each port number will be incremented by 4 for each message. This
increment rule will apply to other channels and other port numbers.
By default , the Account 1 will use Channel 0, Account 2 Channel 1,
Account 3 Channel 2, Account 4 Channel 3, Account 5 Channel 4 and
Account 6 Channel 5.
If an account needs to establish multiple session simultaneously, the
system will use the ports in the next available channels.
The default value is 5004. The valid range is from 1024 to 65400.
Use Random Port
It will force the phone system to use random ports for both SIP and
RTP messages. This is usually necessary when multiple phones are
behind the same full cone NAT. The default setting is "No".
Note: This parameter must be set to "No" for Direct IP Calling to work.
Disable in-call DTMF display
It will enable/disable the phone system to omit the DTMF digits
displaying from the LCD screen. The default setting is "No".
Hide LDAP Contacts
It will enable/disable the phone system to omit the LDAP contacts will
from LCD screen. If it is enabled, end user is not allowed to use it in
the Contact app. The default setting is “No”.
Hide Local Call History
It will enable/disable the phone system to omit the Local Call History
will from LCD screen. It only valid when the Broadsoft Xsi call logs
feature is enabled. If it is enabled, end user will enter the Broadsoft Xsi
call logs directly from the Call History app from the LDC screen. The
default setting is “No”.
Keep-alive Interval (s)
It is used to specify how often the phone system will send a Binding
Request packet to the SIP server in order to keep the "ping hole" on
the NAT router to open. The default setting is 20 seconds. The valid
range is from 10 to 160.
STUN Server
It is used to configure the URI of STUN (Simple Traversal of UDP for
NAT) server. The phone system will send STUN Binding Request
packet to the STUN server to learn the public IP address of its network.
Only non-symmetric NAT routers work with STUN. The default setting