User manual

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Echo Test Number
Set echo test number. If IAX2 server supports echo test, and echo test
number is non- numeric, system could set an echo test number to
replace the echo test text. So user can dial the numeric number to test
echo voice test. This function is provided with server to make
endpoint to test whether endpoint could talk through server normally.
Echo Test Text Specify echo test text’s name.
Refresh Time Set expire time of IAX2 server register, you can set it between 60 and
3600 seconds.
Enable Register Start to register the IAX2 server or not by selecting it or not.
Enable G.729 Enable or disable code G.729 by selecting it or not
4.3.3.3. Stun Config
In this web page, you can config SIP STUN.
STUN:
By STUN server, the phone in private network could know the type of NAT and the NAT
mapping IP and port of SIP. The phone might register itself to SIP server with global IP and port to
realize the device both calling and being called in private network.