Draytek Vigor2710 Series User Manual page 71

Loop through
Backup Phone Number
D D i i g g i i t t M M a a p p
For the convenience of user, this page allows users to edit prefix number for the SIP account
with adding number, stripping number or replacing number. It is used to help user having a
quick and easy way to dial out through VoIP interface.
Enable
Match Prefix
the same SIP server, sometimes, the VoIP phone call
connection may not succeed. By using the specified dial out
account, the successful connection can be assured.
The selection should be as the following:
When the VoIP phone is obstructs or the Internet breaks down
for some reasons, the backup phone will be dialed out to
replace the VoIP phone number. At this time, the phone call
will be changed from VoIP phone into PSTN call according to
the loop through direction chosen. Note that, during the phone
switch, the blare of phone will appear for a short time. And
when the VoIP phone is switched into the PSTN phone, the
telecom co. might charge you for the connection fee. Please
type in backup phone number (PSTN) for this VoIP phone
setting.
Check this box to invoke this setting.
The phone number set here is used to add, strip, or replace the
OP number.
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Vigor2710 Series User's Guide