
Chapter 20: Three-port switch and VLAN
functionality
System overview
The Full VLAN support feature can create Avaya 1200 Series IP Deskphone Voice-VLAN and
PC Data-VLAN on the three-port switch manually and automatically (see
Figure 25: Voice-
VLAN and Data VLAN on page 176).
If both Data and Voice VLANs are enabled on a three-port switch, only the frames with Data
and Voice VLAN tagged go to 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 three-port switch, all kinds of frames go to the Network,
the IP Deskphone receives only the frames with Voice VLAN tagged and send all frames with
Voice VLAN tagged. PC or Local Networks receive all kinds of frames.
SIP Software for Avaya 1200 Series IP Deskphones-Administration January 2012 175
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