D-Link DVG-5402SP User Manual page 35

DVG-5402SP User's Manual
ADVANCED → VoIP → Digit Map
For example, Assume
Server 1 is local ITSP
As you make Mobile call, it will try local ITSP as first priority.
–
Server 2 is VoIP STUN (ITSP, free to dial to some cities free charge)
– As you make long distance calls, it will try free ITSP at first. If fail, it will go through local ITSP
(Server 1).
Server 3 is ITSP in UK
As you dial to UK call, UK ITSP is first priority.
–
D-Link Systems, Inc.
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ADVANCED