D-Link DWC-2000

D-Link DWC-2000 User Manual 138
Section 5 - Advanced Network Conguration
Voice VLANs
Path: Network > VLAN > Advanced VLAN > Voice VLAN
The voice VLAN feature enables controller ports to carry voice trac with dened settings so that voice and data
trac are separated when coming onto the port. A voice VLAN ensures that the sound quality of an IP phone is
safeguarded from deterioration when data trac on the port is high.
The inherent isolation provided by VLANs ensures that inter‐VLAN trac is under management control and that
network‐attached clients cannot initiate a direct attack on voice components. A QoS protocol based on the
IEEE 802.1P class‐of‐service (CoS) protocol uses classication and scheduling to send network trac from the
controller in a predictable manner. The system uses the source MAC of the trac traveling through the port to
identify the IP phone data ow.
Voice VLAN is enabled per‐port basis. A port can participate only in one voice VLAN at a time. The Voice VLAN
feature is disabled by default.
1. Go to Network > VLAN > Advanced VLAN > Voice VLAN tab.
2. Toggle Activate Voice VLAN to ON and click Save.
3. Click Add New Voice VLAN.
4. Select the interface and Voice VLAN mode.
• VLAN: The voice VLAN packets are uniquely identied by a number you assign. All voice trac
carries this VLAN ID to distinguish it from other data trac which is assigned the port’s default
VLAN ID. However, voice trac is not prioritized dierently than other trac.
• Dot1q: This parameter is set by the VoIP device for all voice trac to distinguish voice data from
other trac. All other trac is assigned the port’s default priority.
5. Click Save.