ZyXEL Communications FMG3024-D10A Series - Page 16

Chapter 1 Introduction
FMG3024-D10A / FMG3025-D10A Series User’s Guide
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Figure 2 Device’s VoIP Application
The Device sends your call to a VoIP service provider’s SIP server which forwards your calls to
either VoIP or PSTN phones.
PSTN