3Com 5500-EI PWR - Support for Voice VLAN on Various Ports

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Support for Voice VLAN on Various Ports
Voice VLAN packets can be forwarded by access ports, trunk ports, and hybrid ports. You can enable a
trunk or hybrid port belonging to other VLANs to forward voice and service packets simultaneously by
enabling the voice VLAN.
For different types of IP phones, the support for voice VLAN varies with port types and port configuration.
For IP phones capable of acquiring IP address and voice VLAN automatically, the support for voice
VLAN is described in
Table 1-2.
Table 1-2 Matching relationship between port types and voice devices capable of acquiring IP address
and voice VLAN automatically
Voice VLAN
assignment
mode
Voice
traffic
type
Port type Supported or not
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 traffic of
the default VLAN.
Tagged
voice
traffic
Hybrid
Supported
Make sure the default VLAN of the port exists and is not
a voice VLAN, and the traffic of the default VLAN is
permitted to pass through the connecting port
Access
Trunk
Automatic
Untagge
d voice
traffic
Hybrid
Not supported, because the default VLAN of the port
must be a voice VLAN and the access port is in the voice
VLAN. This can be done by adding the port to the voice
VLAN manually.
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 traffic of
the default VLAN and the voice VLAN.
Tagged
voice
traffic
Hybrid
Supported
Make sure the default VLAN of the port exists and is not
a voice VLAN, the traffic of the default VLAN is permitted
to pass through the connecting port, and the voice VLAN
is in the list of the tagged VLANs whose traffic is
permitted by the access port.
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 traffic of the VLAN.
Manual
Untagge
d voice
traffic
Hybrid
Supported
Make sure the default VLAN of the port is a voice VLAN
and is in the list of untagged VLANs whose traffic is
permitted by the port.