Alarm Indication Signal. A signalling condition of all "1"'s on a Primary Rate interface, indicating that the PRI equipment has failed.
American Standard Code for Information Interchange.
British Telecommunications Network Requirement.
Code Excited Linear Prediction.
Calling/Called Line Category.
Calling Line Identifier.
Digital Access Signalling System Number 2. The current version of the DASS protocol. Often just referred to as DASS.
Digital Private Network Signalling System.
Dual tone multifrequency.
Encryption Control Protocol.
Baseband LAN specification invented by Xerox Corporation and developed jointly by Xerox, Intel, and Digital Equipment Corporation.
European Telecommunications Standards Institute.
Part of the H.248 / H.323 standards. Fast Start reduces voice path connection delay during call setup.
Describes the 64 Kbit/s PCM voice coding technique. In G.711, encoded voice is already in the correct format for digital voice delivery in the PSTN or through PBXs. This is described in the ITU-T G-series recommendations.
Describes a compression technique that can be used for compressing speech or audio signal components at a very low bit rate as part of the H.324 family of standards.
Describes CELP compression where voice is coded into 8 Kbit/s streams. There are two variations of this standard (G.729 and G.729 Annex A) that differ mainly in computational complexity; both provide speech quality similar to 32Kbit/s ADPCM and are described in the ITU-T standard in its G-series recommendations.
An ITU standard that governs H.225.0 session establishment and packetisation. H.225.0 actually describes several different protocols: RAS, use of Q.931 and use of RTP.
An ITU standard that governs H.245 endpoint control.
Extension of ITU-T standard H.320 that enables videoconferencing over LANs and other packet-switched networks, as well as video over the Internet.
An ITU standard that defines supplementary services.
Integrated Services Digital Network.
International Telecommunication Union.
Telecommunication standardization sector of ITU.
Local Area Network.
Light Emitting Diode.
Multipoint Control Unit.
Management Information Base.
Non-Facility Associated Signalling.
Network Management System.
Network Time Protocol.
Non-Volatile Random Access Memory.
Originating Line Indicator (ITU-T/CCS #7).
Password Authentication Protocol.
Perceptual Analysis Measurement System.
Private Branch Exchange.
Power On Self Test.
Add to the start of.
Primary Rate Interface.
Perceptual Speech Quality Measurement.
Public Switched Telephone Network.
ITU-T specification for signalling to establish, maintain, and clear ISDN network connections.
A signalling standard. Common channel signalling protocol based on ISDN Q.931 standards and used by many digital PBXs. Q (point of the ISDN model) Signalling.
Quality of Service.
Remote Authentication Dial In User Service (RFC 2865).
Remote Alarm Indication. An indication in the channel framing information on a Primary Rate Interface showing that the equipment signalling the condition detects a problem in the link or attached equipment.
Registration Admission and Status.
Recommended Standard 232 (computer serial interface, IEEE).