Applications; Make Calls Via Internet Telephony Service Provider; Figure 1 Internet Telephony Service Provider Application; Table 1 Models Covered - ZyXEL Communications V500 Series User Manual

Chapter 1 Introduction
At the time of writing, this User's Guide covers the following models.

Table 1 Models Covered

V500
V501

1.2 Applications

Here are some examples of how you can use your V500.

1.2.1 Make Calls via Internet Telephony Service Provider

In a home or small office environment, you can use the V500 to make and receive
VoIP telephone calls through an Internet Telephony Service Provider (ITSP).
The following figure shows a basic example of how you make a VoIP call through
an ITSP. In this example, you make a call from your V500 (A in the figure), which
sends the call through your modem or router (B) to the Internet and the ITSP's
SIP server (C). The VoIP call server forwards calls to PSTN (Public Switched
Telephone Network) phones through a trunking gateway (D) to phones on the
PSTN network (E). The VoIP call server also forwards calls to IP phones (F)
through the Internet.

Figure 1 Internet Telephony Service Provider Application

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IP phone.
IP phone with Power over Ethernet (PoE)
capability.
V500 Series User's Guide