User`s manual

4. If your gateway under the NAT/Firewall, you should setting different NAT Pass function. if you

setting STUN/Outbound Proxy, you should have a STUN/Outbound proxy server. If they can’t

pass NAT or one way talk happen, try to open “DMZ” and virtual server “5060” port in router.

Symmetric RTP: default use Nat pass function.

STUN Client: setting your STUN server information, default STUN server is FWD STUN

server.

Outbound Proxy Support: Setting your Outbound Proxy server information.

Local SIP Port:: setting local use SIP port, default is 5060.

SIP VoIP Advanced Configuration

There are many SIP VoIP, Codec and other more detail Setting, you can set in “Advance

Setting”. For SIP and H.323, there are a little different in advance setting. There are 3 different

parts to setting about VoIP, Telephone and network.

[VoIP Advance]

Item Description

DTMF Relay for SIP:

After the VoIP call is connected, when you dial a digit, this digit is sent

to the other side by DTMF tone. There are three methods of sending

the DTMF tone. The first one is “in band”, that is, sending the DTMF

tone in the voice packet. The second one is “RFC2833”, that is,

sending the DTMF tone as a RTP payload signal. The third one is

“SIP Info”, that is, sending the DTMF tone as a SIP signal. Sending

DTMF tone as a signal could tolerate more packet loss caused by the

network. If this selection is enabled, the DTMF tone will be sent as a