User guide

VoIP Settings
4038767 Rev A 35
Advanced
If the TES301 is behind a firewall, you can select NAT Traversal mode and enter the
necessary information obtained from your service provider, this function may help
traverse firewall and provide voice service normally. The Codec Settings fields allow
you to change the setting used in a voice call. Dual-tone multi-frequency signaling
(DTMF) Settings provide a method to transmit digital keys pressed during voice
calls.
1 From the TES301 dashboard, click the Change Settings button located in the
VoIP Settings cell.
2 Do you want to use the NAT Traversal Mode feature?
 If no, select None from the NAT Traversal Mode drop-down menu; then,
skip to the last step.