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There are two operational modes for IP Phones:
z IP phones are configured with VLAN-mode as enabled, ensuring that tagged packets are used for
all communications.
z 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:
z Modifying OUI Definitions
z Defining Voice VLAN Global Settings
z Defining Voice VLAN Port Settings
z Viewing Voice VLAN Port Settings
z Viewing OUI Summaries
z 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 3-59 Voice VLAN OUI Modify Page
The Voice VLAN OUI Modify Page contains the following fields:
Table 3-48 Voice 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.