Cisco 7985G Administration Guide - Page 34

Networking Protocol, Purpose, Usage Notes, Cisco Unified IP Phones use the RTP - manual

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Chapter 1 An Overview of the Cisco Unified IP Video Phone What Networking Protocols Are Used? Table 1-1 Supported Networking Protocols on the Cisco Unified IP Phone Networking Protocol Cisco Discovery Protocol (CDP) Dynamic Host Configuration Protocol (DHCP) Internet Protocol (IP) Real-Time Transport Protocol (RTP) Purpose Usage Notes CDP, a device-discovery protocol, runs on all Cisco-manufactured equipment. Using CDP, a device can advertise its existence to other devices and receive information about other devices in the network. The Cisco Unified 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. 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 your needing to manually assign an IP address or to configure additional network parameters. The system enables DHCP by default. If DHCP is disabled, you must manually configure the IP address, subnet mask, gateway, and a TFTP server on each phone locally. Cisco recommends that you use DHCP custom option 150. With this method, you configure the TFTP server IP address as the option value. For additional supported DCHP configurations, refer to Cisco Unified CallManager System Guide. IP messaging protocol addresses and To communicate by using IP, ensure sends packets across the network. network devices have an assigned IP address, subnet, and gateway. IP addresses, subnets, and gateways identifications automatically get assigned if you are using the Cisco Unified IP Phone with Dynamic Host Configuration Protocol (DHCP). If you are not using DHCP, you must manually assign these properties to each phone locally. RTP serves as a standard protocol for transporting real-time data, such as interactive voice and video, over data networks. Cisco Unified IP Phones use the RTP protocol to send and receive real-time voice traffic from other phones and gateways. OL-8726-02 Cisco Unified IP Video Phone 7985G Administration Guide 1-8

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1-8
Cisco Unified IP Video Phone 7985G Administration Guide
OL-8726-02
Chapter 1
An Overview of the Cisco Unified IP Video Phone
What Networking Protocols Are Used?
Table 1-1
Supported Networking Protocols on the Cisco Unified IP Phone
Networking Protocol
Purpose
Usage Notes
Cisco Discovery
Protocol (CDP)
CDP, a device-discovery protocol,
runs on all Cisco-manufactured
equipment.
Using CDP, a device can advertise its
existence to other devices and receive
information about other devices in
the network.
The Cisco Unified 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.
Dynamic Host
Configuration Protocol
(DHCP)
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
your needing to manually assign an
IP address or to configure additional
network parameters.
The system enables DHCP by
default. If DHCP is disabled, you
must manually configure the IP
address, subnet mask, gateway, and a
TFTP server on each phone locally.
Cisco recommends that you use
DHCP custom option 150. With this
method, you configure the TFTP
server IP address as the option value.
For additional supported DCHP
configurations, refer to
Cisco
Unified CallManager System Guide
.
Internet Protocol (IP)
IP messaging protocol addresses and
sends packets across the network.
To communicate by using IP, ensure
network devices have an assigned IP
address, subnet, and gateway.
IP addresses, subnets, and gateways
identifications automatically get
assigned if you are using the Cisco
Unified IP Phone with Dynamic Host
Configuration Protocol (DHCP). If
you are not using DHCP, you must
manually assign these properties to
each phone locally.
Real-Time Transport
Protocol (RTP)
RTP serves as a standard protocol for
transporting real-time data, such as
interactive voice and video, over data
networks.
Cisco Unified IP Phones use the RTP
protocol to send and receive
real-time voice traffic from other
phones and gateways.