Interlogix NS3500-28T-4S User Manual - Manual (Page 215)

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The page includes the following fields:
Object Description
 Queue ID Display the current queue ID
 Rate Limit (Kbps) Display the current rate limit.
4.8.5 Voice VLAN
4.5.8.1 Introduction to Voice VLAN
Configure the switch port rate limit for the switch port on this page.
Voice VLAN is specially configured for the user voice data traffic. By setting a Voice VLAN and adding the ports of the
connected voice equipments to Voice VLAN, the user will be able to configure QoS (Quality of service) service for
voice data, and improve voice data traffic transmission priority to ensure the calling quality.
The switch can judge if the data traffic is the voice data traffic from specified equipment according to the source MAC
address field of the data packet entering the port. The packet with the source MAC address complying with the system
defined voice equipment OUI (Organizationally Unique Identifier) will be considered the voice data traffic and
transmitted to the Voice VLAN.
The configuration is based on MAC address, acquiring a mechanism in which every voice equipment transmitting
information through the network has got its unique MAC address. VLAN will trace the address belongs to specified
MAC. By This means, VLAN allows the voice equipment always belong to Voice VLAN when relocated physically. The
greatest advantage of the VLAN is the equipment can be automatically placed into Voice VLAN according to its voice
traffic which will be transmitted at specified priority. Meanwhile, when voice equipment is physically relocated, it still
belongs to the Voice VLAN without any further configuration modification, which is because it is based on voice
equipment other than switch port.
The Voice VLAN feature enables the voice traffic to forward on the Voice VLAN, and then the
switch can be classified and scheduled to network traffic. It is recommended there are two
VLANs on a port -- one for voice, one for data.