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Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 4.0 and 4.1
OL-7104-01
Chapter 2 An Overview of the Wireless Network
Components of the VoIP Wireless Network
Internet Protocol (IP)
Messaging protocol that addresses
and sends packets across the
network.
To communicate using IP, network
devices must have an assigned IP
address, subnet, and gateway.
IP addresses, subnet, and gateway
identifications are automatically
assigned if you are using the
Cisco IP Phone with DHCP. If you
are not using DHCP, you must
manually assign these properties to
each phone locally.
Real-Time Transport
(RTP)
Standard for transporting real-time
data, such as interactive voice and
video, over data networks.
Cisco IP Phones use the RTP
protocol to send and receive
real-time voice traffic from other
phones and gateways.
Skinny Client Control
Protocol (SCCP)
Uses Cisco-proprietary messages to
communicate between IP devices and
Cisco CallManager.
Cisco IP Phones use SCCP protocol
for VoIP call signaling and enhanced
features such as Message Waiting
Indication (MWI).
Temporal Key Integrity
Protocol (TKIP) with
message integrity check
(MIC)
Encryption and data integrity
protocol that encrypts data sent over
the wireless LAN.
Cisco Wireless IP Phone 7920 uses
TKIP/MIC algorithms to secure and
preserve the integrity of voice
communications.
Transmission Control
Protocol (TCP)
Connection-oriented transport
protocol.
Cisco IP Phones use TCP to connect
to Cisco CallManager and to access
XML services.
Trivial File Transfer
Protocol (TFTP)
Method for transfering files over the
network.
On the Cisco IP Phone, TFTP
enables you to obtain a configuration
file specific to the phone type.
You must have a TFTP server in your
network that the DHCP server
automatically identifies. If more than
one TFTP server is running in your
network, you must manually assign a
TFTP server to each phone.
User Datagram Protocol
(UDP)
Connectionless messaging protocol
for delivery of data packets.
Cisco IP Phones receive and process
UDP messages. RTP voice traffic
runs over UDP.
Table 2-1
Supported Networking Protocols on the Cisco Wireless IP Phone 7920 (continued)
Networking Protocol
Purpose
Usage Notes
Содержание 7920 - Unified Wireless IP Phone VoIP
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