Cisco 6821 Administration Guide

DescriptionDefaultField Type
or Choices
Field
Enter a predefined DHCP VLAN option to learn the voice VLAN
ID.
When you use a VLAN ID with CDP, LLDP, or manually select
a VLAN ID, that VLAN ID takes precedent over the selected
DHCP VLAN option.
Valid values are:
• Null
• 128 to 149
• 151 to 158
• 161 to 254
Default value is null.
Cisco recommends that you use DHCP Option 132.
DHCP VLAN option
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
42
Phone Installation
Network Configuration Fields

Cisco 6821 Specifications

General

Resolution	320 x 240 pixels
Speakerphone	Yes
Headset Port	Yes
Protocols	SIP
USB Port	No
Wireless	No
Bluetooth	No
Video Support	No
Conference Capabilities	Yes
Wall Mountable	Yes
Display	3.5-inch grayscale
Ethernet	10/100 Ethernet
Line Keys	2
PoE	IEEE 802.3af Power over Ethernet (PoE)
Codecs	G.711, G.722, G.729, iLBC
Weight	2.0 lb (0.91 kg)