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AX-112 Analog Telephone Adapter 15
Chapter3-Conguration
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3.3.3 NAT traversal setting
Select the NAT traversal type. You may check the uPnP button if your NAT/Firewall
supports uPnP SIP ALG, or assign the STUN server IP if you are using STUN
service. You may also assign the RTP port if there is port enabling on your router
settings.
3.3.4 ToS/DiffServ settings
This sub-page is used to congure the Type-of-Service/Diffserv byte values. These
values are to be used in the IP header of all transmitted SIP signaling packets and
RTP packets. The ToS/DiffServ byte values are entered as a two-digit hexadecimal
value. If no special ToS/DiffServ value is to be used for a particular trafc type,
enter “00” or leave the setting empty.
3. 4 Advanced setting
There are ve sub-pages in the advanced settings page. Basically, this page is for
the advanced users. Most of the time, the default settings should work for normal
application unless your service provider needs special conguration.
CODECconguration
Choose which codecs are to be supported. For SIP protocol, the G711U and
G711A protocols are always supported by default. You can select which complex
codec is to be supported in AX-112. But due to memory limitations, it is not possible
to select more than one complex codec at the same time.
You can also select to enable or disable the silent suppression function for each
codec type. To do this, just click on the checkbox beside a codec type.
3.4.1 CODEC & Packet