
Issue 1 January 2008 97
Signaling
Channel
Encryption
Encryption of the signaling protocol exchanged between the IP telephone and the call
server. Signaling channel encryption provides additional security to the security
provided by channel encryption.
SIP Session Initiation Protocol. An alternative to H.323 for VoIP signaling. The only
protocol that Avaya Agent Deskphone 16CC telephones support.
SNTP Simple Network Time Protocol. An adaptation of the Network Time Protocol used to
synchronize computer clocks in the internet.
SRTCP Secure Real-time Transport Control Protocol.
SRTP Secure Real-time Transport Protocol.
System -
specific
Specific to a particular type of call server, for example, Avaya Communication
Manager (CM). “System-specific signaling” refers to messages specific to the
signaling protocol used by the system, for example, H.323 and/or CCMS messages
used by CM and IP Office. “System-specific procedures” refers to telephone software
procedures that are specific to the call server with which the software is intended to be
used.
TCP/IP Transmission Control Protocol/Internet Protocol, a network-layer protocol used on
LANs and internets.
TFTP Trivial File Transfer Protocol, used to provide downloading of upgrade scripts and
binary files to certain IP telephones. 16CC telephones use HTTP or HTTPS instead of
TFTP.
TLS Transport Layer Security, an enhancement of Secure Sockets Layer (SSL). TLS is
compatible with SSL 3.0 and allows for privacy and data integrity between two
communicating applications.
TLV Type-Length-Value elements transmitted and received as part of Link Layer Discovery
Protocol (LLDP).
UDP User Datagram Protocol, a connectionless transport-layer protocol.
URI & URL Uniform Resource Identifier and Uniform Resource Locator. Names for the strings
used to reference resources on the Internet (for example, HTTP://....). URI is the
newer term.
VLAN Virtual LAN.
VoIP Voice over IP, a class of technology for sending audio data and signaling over LANs.
WML Wireless Markup Language, used by Web Browsers to communicate with WML
servers. Not applicable to Avaya Agent Deskphone 16CC telephones.
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