Draytek Vigor2500V Manual page 180

We would like to remind you of the benefits of Vigor2500V series as
below once your technical queries are resolved:
Benefits of Vigor2500V series
ADSL router for sharing your Internet connection
Robust firewall to help protect your computers
Make / Receive Voice calls over your ADSL connection using a regular
telephone handset
Integration with your existing phone line (POTS) with automatic failover
during power cuts
Free Voice-over-IP phone calls to other VoIP users
ISDN backup/remote access/ISDN loop through are available on
Vigor2500Vi series which have ISDN interface
Compatible with Windows and Mac OS
TroubleShooting of Vigor2500V series
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