P-2302HW/HWL-P1 Series User’s Guide

Figure 88 PSTN Phone To VoIP Phone

13.4.3 PSTN Phone To PSTN Phone via VoIP

A PSTN phone A makes a call to the ZyXEL Device B. B connects to a peer device C and C forwards the call to a PSTN phone D.

Figure 89 PSTN Phone To PSTN Phone via VoIP

13.5 Trunking General Screen

Use this screen to enable VoIP trunking, click VoIP > Trunking > General.

Note: VoIP trunking requires the following additional configuration in the VoIP > SIP > SIP Settings > Advanced Setup screen: Voice Compression field needs to be set to G.729 and DTMF Mode field needs to be set to SIP INFO.

Figure 90 VoIP > Trunking > General

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Chapter 13 VoIP Trunking