3Com Switch 7750 Configuration Guide

Voice VLAN Overview 107
c
CAUTION: If the voice stream transmitted by an IP voice device is with VLAN tag
and the port which the IP voice device is attached to is enabled with 802.1x
authentication and 802.1x guest VLAN, assign different VLAN IDs for the voice
VLAN bound to the port, the default VLAN of the port, and the 802.1x guest
VLAN to ensure the two functions to operate properly.
Manual mode Tagged voice stream Access Not supported
Trunk Supported
Make sure the
default VLAN of
the port exists and
is not a voice VLAN.
And the access port
permits the packets
of the default
VLAN.
Hybrid Supported
Make sure the
default VLAN of
the port exists and
is in the list of the
tagged VLANs
whose packets are
permitted by the
access port.
Untagged voice stream Access Supported
Make sure the
default VLAN of
the port is a voice
VLAN.
Trunk Supported
Make sure the
default VLAN of
the port is a voice
VLAN and the port
permits the packets
of the VLAN.
Hybrid Supported
Make sure the
default VLAN of
the port is a voice
VLAN and is in the
list of untagged
VLANs whose
packets are
permitted by the
port.
Table 58 Matching relationship between port modes and voice stream types
Port voice VLAN
mode Voice stream type Port type Supported or not