ZyXEL Communications EMG5324-D10A ユーザーズマニュアル

 Chapter 18 VoIP

EMG5324-D10A User’s Guide

Virtual Local Area Network (VLAN) allows a physical network to be partitioned into multiple logical 
networks. Only stations within the same group can communicate with each other. 

Your Device can add IEEE 802.1Q VLAN ID tags to voice frames that it sends to the network. This 
allows the Device to communicate with a SIP server that is a member of the same VLAN group. 
Some ISPs use the VLAN tag to identify voice traffic and give it priority over other traffic.

Supplementary services such as call hold, call waiting, and call transfer. are generally available from 
your VoIP service provider. The Device supports the following services:

• Call  Hold
• Call Waiting
• Making a Second Call
• Call Transfer
• Three-Way Conference
• Internal Calls
• Do not Disturb

Note: To take full advantage of the supplementary phone services available through the 

Device's phone ports, you may need to subscribe to the services from your VoIP 

service provider.

Flashing means to press the hook for a short period of time (a few hundred milliseconds) before 
releasing it. On newer telephones, there should be a "flash" key (button) that generates the signal 
electronically. If the flash key is not available, you can tap (press and immediately release) the 
hook by hand to achieve the same effect. However, using the flash key is preferred since the timing 
is much more precise. With manual tapping, if the duration is too long, it may be interpreted as 
hanging up by the Device.

You can invoke all the supplementary services by using the flash key. 

This section describes how to use supplementary phone services with the Europe Type Call 
Service Mode. Commands for supplementary services are listed in the table below.