Draytek Vigor2500V Manual page 110

VoIP
The Vigor2500V's VoIP facilities can provide a cost-saving alternative to
having an additional fixed-line. By using the ITSP (e.g. DrayTEL,
www.draytel.org) you can also make calls to any regular phone line too,
including mobiles, as well as receive calls from anyone - the call is carried
to your phone via your internet connection so your regular phone line
remains free for other people/calls.
There are two ways for you to make a call to other Vigor VoIP router users;
by dialling their IP address directly on the phone handset or using a SIP
registrar. A SIP server on the Internet enables your router to log its current
location (IP Address) and availability so that other users can call you on
your SIP address (e.g. 98141@draytel.org)
Before you can set up the router for SIP you need to open an account
with a SIP registrar [e.g. IPTEL, DrayTEL (www.draytel.org)].
Our Vigor2500V firstly apply efficient codecs designed to make the best use
automatic
of available bandwidth, but Vigor2500V also equips with
QoS assurance
!! QoS Assurance assists to assign high priority to
voice traffic via Internet. You will always have the required inbound and
outbound bandwidth which is prioritized exclusively for Voice traffic over
Internet but you just get your data a little slower and it is tolerable for data
traffic.
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