Prestige 2002 Series
17
Specify phone numbers that should always use the regular phone service (without having to dial a
prefix number). Do this for emergency numbers (like those for contacting police, fire or emergency
medical services).
Specify the prefix number for dialing regular calls
.
Use the
Relay to PSTN
fields to specify phone numbers to
which the Prestige always sends calls through the regular
phone service (without the need of dialing a prefix number).
These numbers must be for phones on the PSTN (not VoIP
phones).
Click
Apply
to save your changes back to the Prestige.
7 Dealing with NAT and Firewalls
A SIP Application Layer Gateway (ALG) is a NAT router that allows VoIP calls to pass through.
With a SIP ALG, you do not need to use STUN or do any extra configuration for the Prestige 2002.
STUN allows you to use a NAT (Network Address Translation) router between the Prestige 2002
and the Internet. STUN does not work with symmetric NAT routers or firewalls. If your ISP
provides the IP address of a STUN server, click
VoIP
and then
Advanced
to open this screen.
