Draytek Vigor2710 Series User Manual page 172

Expiry Time
NAT Traversal Support
Ring Port
Ring Pattern
The time duration that your SIP Registrar server keeps your
registration record. Before the time expires, the router will
send another register request to SIP Registrar again.
If the router (e.g., broadband router) you use connects to
internet by other device, you have to set this function for your
necessity.
None – Disable this function.
Stun – Choose this option if there is Stun server provided for
your router.
Manual – Choose this option if you want to specify an
external IP address as the NAT transversal support.
Nortel – If the soft-switch that you use supports Nortel
solution, you can choose this option.
Set Phone1 or Phone2 as the default ring port for this SIP
account.
Choose a ring tone type for the VoIP phone call.
164 Vigor2710 Series User's Guide