Cisco ATA 190 Administration Manual page 68

Glossary
The running of a data set through an algorithm that reduces the space required to store or the bandwidth
compression
required to transmit the data set. Compare with companding and expansion.
Class of service. An indication of how an upper-layer protocol requires a lower-layer protocol to treat
CoS
its messages. In SNA subarea routing, CoS definitions are used by subarea nodes to determine the
optimal route to establish a given session. A CoS definition comprises a virtual route number and a
transmission priority field.
D
Dynamic Host Configuration Protocol. Provides a mechanism for allocating IP addresses dynamically
DHCP
so that addresses can be reused when hosts no longer need them.
An addressable call endpoint. In Voice over IP (VoIP), there are two types of dial peers: POTS and
dial peer
VoIP.
Domain Name System. System used on the Internet for translating names of network nodes into
DNS
addresses.
digital signal processor. A DSP segments the voice signal into frames and stores them in voice packets.
DSP
dual tone multifrequency. Tones generated when a button is pressed on a phone, primarily used in the
DTMF
U.S. and Canada.
E
The international public telecommunications numbering plan. A standard set by the ITU-T which
E.164
addresses phone numbers.
A SIP terminal or gateway. An endpoint can call and be called. It generates and/or terminates the
endpoint
information stream.
The process of running a compressed data set through an algorithm that restores the data set to its
expansion
original size. Compare with companding and compression.
F
Router or access server, or several routers or access servers, designated as a buffer between any
firewall
connected public networks and a private network. A firewall router uses access lists and other methods
to ensure the security of the private network.
Fax over IP
FoIP
Fully Qualified Domain (FQDN) format "mydomain.com" or "company.mydomain.com."
FQDN
Frequency shift key
FSK
Cisco ATA 190 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
GL-2
OL-31821-01