Cisco IP Phone 6851 User Manual

URLDocument topics
http://www.cisco.com/c/en/us/products/routers/index.html
Integrated Service Routers
http://www.cisco.com/c/en/us/products/ios-nx-os-software/
index.html
Cisco IOS Software
Network Protocols
Cisco IP Phones support several industry-standard and Cisco network protocols that are required for voice
communication. The following table provides an overview of the network protocols that the phones support.
Table 6: Supported Network Protocols on the Cisco IP Phone
Usage NotesPurposeNetwork Protocol
—
BootP enables a network device, such as
the Cisco IP Phone, to discover certain
startup information, such as its IP address.
Bootstrap Protocol (BootP)
The Cisco IP Phone uses CDP to
communicate information such as
auxiliary VLAN ID, per port power
management details, and Quality of
Service (QoS) configuration
information with the Cisco Catalyst
switch.
CDP is a device-discovery protocol that
runs on all Cisco-manufactured
equipment.
A device can use CDP to advertise its
existence to other devices and receive
information about other devices in the
network.
Cisco Discovery Protocol
(CDP)
Cisco IP Phones have a DNS client
to translate domain names into IP
addresses.
DNS translates domain names to IP
addresses.
Domain Name Server
(DNS)
DHCP is enabled by default. If
disabled, you must manually
configure the IP address, subnet
mask, and gateway on each phone
locally.
We recommend that you use the
DHCP custom option 160, 159.
DHCP dynamically allocates and assigns
an IP address to network devices.
DHCP enables you to connect an IP
phone into the network and have the
phone become operational without the
need to manually assign an IP address or
to configure additional network
parameters.
Dynamic Host
Configuration Protocol
(DHCP)
Cisco IP Phones use HTTP for XML
services, provisioning, upgrade and
for troubleshooting purposes.
HTTP is the standard protocol for transfer
of information and movement of
documents across the Internet and the
web.
Hypertext Transfer
Protocol (HTTP)
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
15
Network Protocols

Cisco IP Phone 6851 Specifications

General

Brand	Cisco
Model	IP Phone 6851
Category	IP Phone
Language	English