P-2302HW/HWL-P1 Series User’s Guide

Figure 96 VoIP to PSTN Example - Incoming Authentication

13.8.4 Call Progression

The advantage of this kind of VoIP trunking is that once all the configuration is completed, the caller just has to dial a speed dial entry from a phone connected to their ZyXEL Device and the peer devices take care of the rest. This is what happens when headquarters wants to call their Sales1 employee, which is the first entry in the speed dial screen.

Table 77 VoIP Trunking Call Progression

HEADQUARTERS

BRANCH OFFICE

SALES1

 

 

 

A person at A dials #01 from the phone connected to the ZyXEL Device.

The ZyXEL Device at A inspects the number and connects to the remote peer device at

B.

The remote peer device inspects the number and requests authentication in order to forward the call.

The ZyXEL Device at A sends outgoing authentication to the remote peer device.

The remote peer device confirms that the username and password match an account in its incoming authentication list.

The remote peer device forwards the call to Sales1.

Sales1 picks up and the call commences.

Chapter 13 VoIP Trunking

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