Voice Vlan - TRENDnet TPE-30102WS User Manual

TRENDnet User's Guide
Click Add to add the entry to the table.
In the list, you can click Modify to modify an entry or click Delete or delete the entry.
You can also click Delete All to delete all of the entries in the table. If the entries span
multiple pages, you can navigate page number in the Page field and click Go or you can
click First, Previous, Next, and Last Page to navigate the pages.
4. Click Save Settings to Flash (menu).
5. Click Save Settings to Flash (button), then click OK.
Note: This step saves all configuration changes to the NV-RAM to ensure that if the
switch is rebooted or power cycled, the configuration changes will still be applied.
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Voice VLAN

This chapter contains a description of the Switch's Voice VLAN feature and the
procedures to create, modify, and delete a voice VLAN configuration.
The Voice VLAN feature is specifically designed to maintain high quality, uninterrupted
voice traffic through the switch. When talking on a voice over IP phone, a user expects
to have no interruptions in the conversation and excellent voice quality. The Voice VLAN
feature can be configured to meet these requirements.
CoS with Voice VLAN
The Voice VLAN CoS parameter maintains the voice quality between the ingress and
egress ports of the switch. CoS must be enabled for the Voice VLAN CoS priority to take
effect. The CoS priority level that you config is applied to voice traffic on all ports of the
voice VLAN. Normally, most (non-Voice) Ethernet traffic transverses the switch through
lower order egress queues. To avoid delays and interruptions in the voice data flow, the
CoS priority level assigned to the voice VLAN should be mapped to a higher order queue
and the scheduling algorithm should be set to Strict Priority. These settings ensure that
the voice data packets are processed before other types of data so that the voice quality
is maintained as the voice data passes through the switch.
Organization Unique Identifier (OUI)
Each IP phone manufacturer can be identified by one or more Organization Unique
Identifiers (OUIs). An OUI is three bytes long and is usually expressed in hexadecimal
format. It is imbedded into the first part of each MAC address of an Ethernet network
device. You can find the OUI of an IP phone in the first three complete bytes of its MAC
address.
Typically, you will find that all of the IP phones you are installing have the same OUI in
common. The switch identifies a voice data packet by comparing the OUI information in
the packet's source MAC address with an OUI table that you configure when you initially
set up the voice VLAN. This is important when the Auto-Detection feature for a port and
is a dynamic voice VLAN port.
When you are configuring the voice VLAN parameters, you must enter the complete
MAC address of at least one of your IP phones. An "OUI Mask" is automatically
generated and applied by the Web Management Utility software to yield the
manufacturer's OUI. If the OUI of the remaining phones from that manufacturer is the
same, then no other IP phone MAC addresses need to be entered into the configuration.
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