User's Manual

Chapter 21: Three-port switch and VLAN
functionality
System overview
The
Full VLAN support feature can create an IP Deskphone Voice VLAN and PC Data VLAN
on the three-port switch manually or automatically (see
Figure 27: Voice-VLAN and Data
VLAN on page 208).
If both Data and Voice VLANs are enabled on a three-port switch, only the frames with Data
and Voice VLAN tagged go to the networks. The IP Deskphone receives only the frames with
Voice VLAN tagged and sends the frames with Voice VLAN tagged, while PC or Local
Networks receive all kinds of frames.
When only voice VLAN is enabled on the three-port switch, all kinds of frames go to the
Network, the IP Deskphone receives only the frames with Voice VLAN tagged and sends all
frames with Voice VLAN tagged. PC or Local Networks receive all kinds of frames.
SIP Software for Avaya 1200 Series IP Deskphones-Administration September 2013 207