Avaya one-X 9600 Series Administrator's Manual page 180

Glossary of Terms
Signaling Encryption of the signaling protocol exchanged between the IP telephone and the call
Channel server. Signaling channel encryption provides additional security to the security
Encryption provided by media channel encryption.
SIP Session Initiation Protocol. An alternative to H.323 for VoIP signaling.
SNTP Simple Network Time Protocol. An adaptation of the Network Time Protocol used to
synchronize computer clocks in the internet.
SOHO Small Office Home Office. The environment for which a virtual private network (VPN)
would be administered.
SPD Security Policy Database. Specifies the policies that determine the disposition of all IP
traffic inbound or outbound from a host or security gateway IPsec implementation.
SPI Security Parameter Index. An identifier for a Security Association, relative to some
security protocol. Each security protocol has its own "SPI-space".
SRTCP Secure Real-time Transport Control Protocol.
SRTP Secure Real-time Transport Protocol.
system Specific to a particular type of call server, e.g., Avaya Communication Manager (CM)
-specific or SIP Enablement Services (SES). "System-specific signaling" refers to messages
specific to the signaling protocol used by the system, e.g., H.323 and/or CCMS
messages used by CM and IP Office, or SIP messages (possibly including
system-specific headers) used by SES. "System-specific procedures" refers to
procedures in telephone software 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
application files to certain IP telephones.
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.
Unnamed Registration with Avaya Communication Manager by an IP telephone with no
Registration extension. Allows limited outgoing calling.
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.
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