FreeWorldDialUp (aka FWD) is a free SIP based VoIP Registrar
Using either an application (SoftPhone?), or a hardware VoIP phone, you can place calls to other VoIP users and in some cases to POTS numbers eg US 800 numbers.
FreeWorldDialUp provide functions such as call forwarding and voice mail.
See AsteriskSampleSetup for details on how to link between FreeWorldDialUp and Asterisk
3 pages link to FreeWorldDialUp:
