N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 1 - An Overview of the Communications Industry                                                              Slide 26 of 26  _________________                                                                                  __________

Glossary

ADSL - Asynchronous Digital Subscriber Line - A method of sending 1.544 M bps data over copper pairs.

ATM - Asynchronous transfer Mode - A very high speed, full-duplex, fixed-length 48 byte cell switching scheme for voice, data and video.

AVVID - Cisco AVVID (Architecture for Voice, Video and Integrated Data) provides the framework for today's Internet business solutions.

Cable Modem - A device at the customer end to provide the Internet service on cable.

CRTC - Canadian Radio-Television and Telecommunications Commission - The federal agency that regulates Canada's broadcasting and telecommunications industry - http://www.crtc.gc.ca/   

DWDM - Dense WDM - More channels packed more closely through the same optical fiber.

H.323 - An International Telecommunications Union (ITU) recommendation for packet-based multi-media communications.

IP - Internet Protocol - UNIX's internetworking protocol.

ISP - Internet Service Provider - A company that provides users access to the Internet.

Megaco / H.248 - An ITU protocol for communications used in unified packet based voice and data network industry. Similar to MGCP.

MGCP - Media Gateway Control protocol - a text-based protocol for controlling Voice over IP (VoIP) media gateways. Not a standard protocol.

MPLS - Multi-Protocol Label Switching (MPLS) standard packet-based multi-media communications.

NCS Packet Cable Protocol - Network - based Call Signaling similar to MGCP for communications over cable.

PABX - Private Automatic Branch Exchange - also called Private Branch Exchange (PBX) - A telephone switch used by small and medium - sized companies.

QOS - Quality of Service

SET - Secure Electronic Transaction (SET) protocol developed by the credit card companies and banks for secure transactions over the Internet. 

SIP - Session Initiation Protocol - a text-based signaling protocol used for creating and controlling multi-media sessions with two or more users.

SSL - Secure Socket Layer (SSL) protocol used for secure transaction of credit card and purchasing information over the Internet.

SONET - Synchronous Optical Network - A synchronous data framing and transmission scheme over an optical fiber.

T-1 - 1.544 M bps

T-3 - 45 M bps

TCP / IP - Transmission Control Protocol / Internet Protocol

Web Services - Applications using a suite of protocols to standardize e-Commerce between disparate platforms.

Wi-Fi  - Wireless Fidelity: also known an Wireless LAN or 802.11 (a, b, g) standards.

WDM - Wave Division Multiplexing is the technique to send several channels at different wavelengths through the same optical fiber. 

xDSL - (referred to different versions of Digital Subscriber Lines - Asynchronous Digital Subscriber Line (ADSL) - 1.5 M bps, High-Bit-Rate Digital Subscriber Line (HDSL) - full-duplex T-1, Very High Speed Digital Subscriber Line (VDSL) - up to 52 M bps.

XML - Extensible Markup Language (XML) a simple, very flexible text format.

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