PLANET FGSW-2840 - Manual (Page 173)

User’s Manual of FGSW-2840 / FGSW-4840S
4.7.3 Voice VLAN
The Voice VLANs are configured specially for voice data stream. By configuring Voice VLANs and adding the ports with voice
devices attached to voice VLANs, perform QoS-related configuration for voice data, ensuring the transmission priority of voice
data stream and voice quality.
OUI Address (Organizationally unique identifier address)
The Managed Switch can determine whether a received packet is a voice packet by checking its source MAC address. If the
source MAC address of a packet complies with the OUI addresses configured by the system, the packet is determined as voice
packet and transmitted in voice VLAN.
An OUI address is a unique identifier assigned by IEEE (Institute of Electrical and Electronics Engineers) to a device vendor. It
comprises the first 24 bits of a MAC address. You can recognize which vendor a device belongs to according to the OUI address.
The following table shows the OUI addresses of several manufacturers. The following OUI addresses are preset of the
Managed Switch by default.
Number OUI Address Vendor
1 00-01-e3-00-00-00 Siemens phone
2 00-03-6b-00-00-00 Cisco phone
3 00-04-0d-00-00-00 Avaya phone
4 00-60-b9-00-00-00 Philips/NEC phone
5 00-d0-1e-00-00-00 Pingtel phone
6 00-e0-75-00-00-00 Polycom phone
7 00-e0-bb-00-00-00 3com phone
Table 4-7-1: OUI addresses on the Managed Switch
Port Voice VLAN Mode
A voice VLAN can operate in two modes: automatic mode and manual mode.
Automatic Mode: In this mode, the Managed Switch automatically adds a port which receives voice packets to voice VLAN and
determines the priority of the packets through learning the source MAC of the UNTAG packets sent from IP phone when it is
powered on. The aging time of voice VLAN can be configured on the Managed Switch. If the Managed Switch does not receive
any voice packet on the ingress port within the aging time, the Managed Switch will remove this port from voice VLAN. Voice
ports are automatically added into or removed from voice VLAN.
Manual Mode: You need to manually add the port of IP phone to voice VLAN, and then the Managed Switch will assign ACL
rules and configure the priority of the packets through learning the source MAC address of packets and matching OUI address.
In practice, the port voice VLAN mode is configured according to the type of packets sent out from voice device and the link type
of the port. The following table shows the detailed information.
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