User`s guide

VigorTalk ATA24 Series User’s Guide
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If the router you use connects to Internet by other device, you have to set this function. This
page is used to enable the Nat Traversal function. User could use it to enable the VoIP service
under the NAT environment.
Disable The default setting is disable. If you want to enable this
function, please click the other radio buttons listed below.
Manually Input NAT IP
Address
To input NAT IP address manually, please click this radio
button and type the IP Address in the NAT IP Address field.
Auto Discover NAT IP
Address
To make the NAT IP address configuring automatically by the
system, please click this radio button. There are two options
for you to choose:
Semi-auto, need to config NAT – If you choose this one, you
still have to configure NAT partially by type the required
STUN Local Port, server address and server port.
Full-auto, no need to config NAT (only for SIP) – If you
choose this one, the system will configure NAT settings
automatically. All you have to do is click Apply.
Symmetric Media
If Symmetric Media is enabled, the router will transmit
RTP packets/T.38 packets to the remote side via the IP
address and Port number coming from the receiving RTP
packet. It Symmetric Media is disabled, the router will
transmit RTP packets via SDP (Session Description
Protocol
). The default setting is Disable Symmetric RTP
and T.38.
NAT Status Display current NAT status.