Cisco 7800 Series Administration Manual page 46

Set the Optional Network Servers
The Cisco IP Phone supports voice codec priority. You can select up to three preferred codecs. The administrator
can select the low-bit-rate codec that is used for each line. G.711a and G.711u are always enabled.
Procedure
Step 1 To configure the voice codecs on each extension, in the phone web user interface, navigate to Admin Login
> advanced > Voice > Ext(n), where n is an extension number.
Step 2 In the Audio Configuration section, configure the parameters.
Step 3
Click Submit All Changes.
Set the Optional Network Servers
Optional network servers provide resources such as DNS lookup, network time, logging, and device discovery.
Procedure
Step 1 In the phone web user interface, navigate to Admin Login > advanced > Voice > System.
Step 2 In the Optional Network Configuration section, configure the settings.
Step 3
Click Submit All Changes.
VLAN Settings
If you use a virtual LAN (VLAN), your phone voice packets are tagged with the VLAN ID.
In the VLAN Settings section of the Voice > System window, you can configure these settings:
• Cisco Discovery Protocol (CDP)
• LLDP-MED
• Network Startup Delay
• VLAN ID
Cisco Discovery Protocol
Cisco Discovery Protocol (CDP) is negotiation-based and determines which virtual LAN (VLAN) the Cisco
IP Phone resides in. If you are using a Cisco switch, Cisco Discovery Protocol (CDP) is available and is
enabled by default. CDP has these attributes:
• Obtains the protocol addresses of neighboring devices and discovers the platform of those devices.
• Shows information about the interfaces your router uses.
• Is media and protocol-independent.
Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide
32