User Guide
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of voice traffic and guaranteeing communication quality.
Voice Stream Recognition
According to the source MAC fields of the ingress packets, this device can distinguish whether the data
flow is voice data flow or not. If the source MAC address conforms t
o 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