There are two operational modes for IP Phones:

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IP phones are configured with VLAN-mode as enabled, ensuring that tagged packets are used for all communications.

If the IP phone’s VLAN-mode is disabled, the phone uses untagged packets. The phone uses untagged packets while retrieving the initial IP address through DHCP. The phone eventually uses the Voice VLAN and starts sending tagged packets.

This section contains the following topics:

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Modifying OUI Definitions

Defining Voice VLAN Global Settings

Defining Voice VLAN Port Settings

Viewing Voice VLAN Port Settings

Viewing OUI Summaries

Viewing Voice VLAN

Modifying OUI Definitions

The Voice VLAN OUI Modify Page allows network administrators to add new OUIs or to remove previously defined OUIs from the Voice VLAN. The packet priority derives from the source/destination MAC prefix. The packet gets higher priority when there is a match with the OUI list. Using the OUI, network managers can add a specific manufacturer’s MAC addresses to the OUI table. Once the OUIs are added, all traffic received on the Voice VLAN ports from the specific IP phone with a listed OUI, is forwarded on the voice VLAN.

Click Device > QoS > VoIP Traffic Setting > OUI Modify. The Voice VLAN OUI Modify Page opens.

Figure 3-59Voice VLAN OUI Modify Page

The Voice VLAN OUI Modify Page contains the following fields:

Table 3-48Voice VLAN OUI Modify Page item description

Item

Description

Telephony OUI

Defines a new or existing OUI on the Voice VLAN. The field contains the 3

most significant bytes of the MAC address.

 

 

 

Description

Enters a user-defined OUI description. The field may contain up to 32

characters.

 

 

 

Add

Allows the user to add a new OUI.

 

 

Remove

Allows the user to delete an existing OUI.

 

 

 

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3Com 3CBLSF26H manual Modifying OUI Definitions