User`s manual

Version 5.4 565 May 2008
SIP User's Manual 17. Glossary
17 Glossary
Table 17-1: Glossary of Terms
Term Meaning
ADPCM Adaptive Differential PCM - voice compression
AIS Alarm Indication Signal
A-law Standard companding algorithm, used in European digital communications
systems to optimize the dynamic range of an analog signal for digitizing.
AOR Address of Record
AWG American Wire Gauge
bps Bits per second
BootP AudioCodes Proprietary Bootstrap Loader Utility
BRI Basic Rate Interface (ISDN)
CAS Channel Associated Signaling
CoS Class of Service
CMP Compressed File (device Firmware)
CPT Call Progress Tones
dB Decibels
DHCP Dynamic Host Control Protocol
DID Direct Inward Dial
DiffServ Differentiated Services
DNS Domain Name System (or Server)
DR Debug Recording
DS1 1.544 Mbps USA Digital Transmission System (see E1 and T1)
DSP Digital Signal Processor (or Processing)
DTMF Dual Tone Multiple Frequency (Touch Tone)
E1 2.048 Mbps European Digital Transmission System (see T1)
ETSI European Telecommunications Standards Institute
FQDN Fully Qualified Domain Name
FXS Foreign Exchange Station
FXO Foreign Exchange Office
GRUU Globally Routable User Agent URIs
ICMP Internet Control Message Protocol
IE Information Element (ISDN layer 3 protocol, basic building block)
IETF Internet Engineering Task Force
IKE Internet Key Exchange (for IPSec)
IP Internet Protocol