Chapter 18 VoIP
EMG5324-D10A User’s Guide
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VLAN Tagging
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.
18.8.4 Phone Services Overview
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.
The Flash Key
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.
Europe Type Supplementary Phone Services
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.
