Convergence Switching and the Next-Generation Carrier

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Unformatted text preview: the network entry point for user access lines and are a switching center for local calls Web ProForum Tutorials http://www.iec.org Copyright © The International Engineering Consortium 12/14 CLEC competitive local exchange carrier; these are new local carriers, typically formed after the United States Telecommunications Act of 1996 to compete with the incumbent regional Bell operating companies (RBOCs) CO central office; the facility of a telecommunications common carrier where calls are switched DACS digital access cross-connect system DS digital signal DSLAM digital subscriber line access multiplexer ILEC incumbent local exchange carrier; typically an RBOC, this is usually the incumbent local phone company, which owns most of the local loops and facilities in a serving area IP Internet protocol ISDN integrated services digital network; a switched network providing end-to-end digital connectivity for simultaneous transmission of voice and data over multiple multiplexed communications channels and employing transmission and out-ofband signaling protocols that conform to internationally-defined standards ISP Internet service provider IXC interexchange carrier; a carrier that is allowed to carry traffic from one LATA to another; typically involves long-distance interstate traffic but can also include intrastate toll traffic LATA local access and transport area; a geographical area within which a divested RBOC is permitted to offer exchange telecommunications and exchange access services Web ProForum Tutorials http://www.iec.org Copyright © The International Engineering Consortium 13/14 OSS operations support system; methods and procedures that support the daily operation of a network packet-switched networks operating at broadband digital transmission speeds; the technology is based on fixed-length, 53-byte cells; ATM includes protocols that specify how diverse kinds of traffic are transformed into standardized packets, the transport of which can be managed uniformly within the network. PRI primary rate interface; this is the narrowband ISDN interface standard for highspeed ISDN service; within the United States, this provides 23 channels of data and voice traffic PSTN public switched telephone network; the current narrowband-based telephone network that was designed for voice traffic QoS quality of service RBOC regional Bell operating company; regional companies formed after the divestiture of AT&T in 1984; at the time of the divestiture, there were seven companies, but that number has now been reduced to four; in today’s competitive environment, they are typically referred to as ILECs SNMP simple network management protocol SS7 signaling system 7; the current international signaling standard for all digital exchanges with integrated services; the SS7 network allows call control and transaction messages from the integrated voice and data network to be transferred on communications paths that are separate from the voice and data connections TDM time division multiplex; a multiplexing scheme in which numerous signals are combined for transmission on a single communications line or channel; each signal is broken up into many segments, each having a very short duration and specific time slots within the channel; the slots are assigned whether or not any signals are available for transmission TMN telecommunications management network Web ProForum Tutorials http://www.iec.org Copyright © The International Engineering Consortium 14/14...
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  • Spring '09
  • jahis
  • Telephone exchange, Asynchronous Transfer Mode, Signaling System 7, International Engineering Consortium, Web ProForum Tutorials

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