Cisco Systems ATA187I1ARF manual GL-4

Glossary

IP	Internet Protocol. Network layer protocol in the TCP/IP stack offering a connectionless internetwork
	service. IP provides features for addressing, type-of-service specification, fragmentation and
	reassembly, and security. Defined in RFC 791.
IVR	Interactive voice response. Term used to describe systems that provide information in the form of
	recorded messages over phone lines in response to user input in the form of spoken words or, more
	commonly, DTMF signaling.

L

LDAP

LEC

Location Server

Lightweight Directory Access Protocol

local exchange carrier

A SIP redirect or proxy server uses a location server to get information about a caller’s location. Location services are offered by location servers.

M

MWI

µ-law

message waiting indication

North American companding standard used in conversion between analog and digital signals in PCM systems. Similar to the European a-law. See also a-law and companding.

N

NAT	Network Address Translation. Mechanism for reducing the need for globally unique IP addresses.
	NAT allows an organization with addresses that are not globally unique to connect to the Internet by
	translating those addresses into globally routable address spaces. Also known as Network Address
	Translator.
NSE packets	Real-Time Transport Protocol (RTP) digit events are encoded using the Named Signaling Event (NSE)
	format specified in RFC 2833, Section 3.0.
NAT Server	Network Address Translation. an Internet standard that enables a local-area network (LAN) to use one
	set of IP addresses for internal traffic and a second set of addresses for external traffic.
NTP	Network Time Protocol. Protocol built on top of TCP that assures accurate local time-keeping with
	reference to radio and atomic clocks located on the Internet. This protocol is capable of synchronizing
	distributed clocks within milliseconds over long time periods.

P

POTS		Plain old phone service. Basic phone service supplying standard single-line phones, phone lines, and
		access to the PSTN.
		Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
	GL-4	OL-21862-01