Cisco 6821 Administration Guide

IPv4 Settings
DescriptionParameter
Internet connection type that is configured for the
phone. Options are DHCP and Static IP.
Default: DHCP
Connection Type
Subnet mask of the phone.NetMask
IP address of the phone.Static IP
IP address of the gateway.Gateway
Primary Domain Name Server (DNS) assigned to the
phone.
Primary DNS
Secondary Domain Name Server (DNS) if assigned
to the phone.
Secondary DNS
IPv6 Settings
DescriptionParameter
Internet connection type that is configured for the
phone. Options are DHCP and Static IP.
Default: DHCP
Connection Type
IPv6 address of the phone.Static IP
Identifies number of bits of a global unicast IPv6
address that are part of`the network. For example, if
the IPv6 address is 2001:0DB8:0000:000b::/64, the
number 64 identifies that the first 64 bits are part of
the network.
Prefix Length
IP address of the gateway.Gateway
Primary Domain Name Server (DNS) assigned to the
phone.
Primary DNS
Secondary Domain Name Server (DNS) if assigned
to the phone.
Secondary DNS
Options are Disabled and Enabled.
Default: Disabled
Broadcast Echo
When enabled, phone generates an IPv6 address by
default with the prefix length sent from the router.
Options are Disabled and Enabled.
Default: Enabled
Auto Config
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
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Phone Troubleshooting
IPv4 Settings

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)