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voice data flow or not. If the source MAC address conforms to the voice device’s OUI (Organizationally Unique
Identifier) address, the packets will be regarded as voice data flow and the port which has received the voice data
flow will automatically join the voice VLAN. Thus, the voice-VLAN-tagged voice traffic of voice devices
connected to this port can be transmitted and enjoys higher transmission priority. You can preset OUI address or
use the default OUI address as the criteria. An Organizationally Unique Identifier (OUI) is a 24-bit number that
uniquely identifies a vendor, manufacturer, or other organization globally or worldwide. This device supports OUI
mask. You can adjust MAC address’ matching depth by setting different masks.
Voice VLAN Supporting Details on Different Ports
Voice VLAN supports transmitting voice data on Access, Trunk and Hybrid ports. Trunk and Hybrid ports of other
VLANs on the switch can transmit voice and data traffic when voice VLAN feature is enabled. As IP phone varies,
different ports need different supporting conditions. As for phones which can obtain IP address and voice VLAN
ID automatically, supporting conditions on ports are described as below:
Voice VLAN
Working Mode
Voice Traffic
Type
Port Link Type
Auto
Tagged
Access: Not supported.
Trunk: Supported, but the default VLAN of the connected
port must already exist and can’t be voice VLAN. And the
default VLAN is allowed to pass on the connected port.
Hybrid: Supported, but the default VLAN of the connected
port must already exist and can’t be voice VLAN. And the
default VLAN should be in the allowed tagged VLAN list.
Untagged
Access, Trunk, Hybrid: Not supported.
Manual
Tagged
Access: Not supported.
Trunk: Supported, but the default VLAN of the connected
port must already exist and can’t be voice VLAN. And the
default VLAN is allowed to pass on the connected port.
Hybrid: Supported, but the default VLAN of the connected
port must already exist and can’t be voice VLAN. And the
voice VLAN should be in the allowed tagged VLAN list.
Untagged
Access: Supported, but the default VLAN of the connected
port must be voice VLAN.
Trunk: Supported, but the default VLAN of the connected
port must be voice VLAN and voice VLAN is allowed to
pass on the connected port.
Hybrid: Supported, but the default VLAN of the connected
port must be voice VLAN and exist in allowed untagged
VLAN list.
As for phones which require manually configured IP address and voice VLAN ID, the matching relationship is
relatively simple, for only tagged voice traffic can be sent.
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