User Manual NRP1004 Series IP Phone
5-24 www.newrocktech.com
Name Description
Echo Test
Number
Enables the IAX2 server to support echo test, a function to check whether the
communication initiated by a terminal to a selected platform is normal. If the value is
set to Enabled, the echo test number is in text format, the phone uses the echo test
number to replace the echo test text..
Echo Test Text
Specifies the name of the echo test text.
Refresh Time
Sets the interval for refreshing the registration information of the IAX2 server. The
value can be an integer ranging from 60 to 3600.
Enable
Registration
Enables the phone to register to the IAX2 server or disables the phone from registering
to the IAX2 server.
Enable G.729AB
Enables the phone to support G.729.
5.5.3 Stun
In this Web page, you can configure SIP STUN.
With a STUN server, the phone in private network can obtain the type of NAT and the NAT mapping
IP and port of SIP. The phone might register itself to the SIP server with global IP address and port to
enable the device to make a call and be called in private network.
Figure 5-17 Stun setting interface
Table 5-15 Stun parameters setting
Name Description
Simple Traversal of UDP through NATs (STUN) Settings
STUN NAT
Traversal
Shows STUN NAT Transverse estimation, true means STUN can penetrate NAT,
while False means not.
Server Address
Sets the IP address of a SIP STUN server.
