PDF user manual for CopperEdge 150

PVC Permanent Virtual Circuit. A FrameRelay term for a configured connectionbetween two devices, usually over a wide-arealink. The “permanent” circuit will persist aslong as its configuration remains in place.Once a PVC is configured between two devices,no setup or disconnect process is required toinitiate or conclude communication over thechannel.RRADIUS “Remote Authentication Dial-In UserService”, a protocol for carrying authentication,authorization, and configuration informationbetween a device that requires authenticationservice and a shared server on which theauthentication data resides.runt frame Term used to describe an invalidor incomplete Ethernet data frame.SSDSL Symmetrical DSL. DSL service in whichdata rates are the same in both directions.shelf A single CE150 unit, consisting of achassis and all of its circuit modules.SNMP Simple Network Management Protocol.A protocol used to monitor and provisionnodes and devices across a network.SNMP agent Device-based software used tomonitor and report status when queried by anSNMP manager. By definition, SNMP agentsrun on managed devices; an SNMP manager isrequired to perform active (command and configuration)functions.SNMP manager System software used toremotely query and configure network devices.A more generic term, also used in this document,is Element Management System.subnet address An extension of the Internetaddressing scheme; allows a location to use asingle IP address for multiple physical networks.subnet mask A 32-bit address mask used inIP to specify a particular subnet.System Control Module The CE150 circuitmodule that controls timing, protocol processingand overall system functionality.TTCA Threshold Crossing Alert. A conditionwhich generates an alarm on the CE150. Usingthe cmAlarmTable which itself uses countersthat measure conditions like overruns, underruns,and errors, you can tell the CE150 toindicate when the number of errors becomesunacceptable.trap An unsolicited messaged generated byan SNMP agent on a network device due to athreshold value being exceeded or the occurrenceof a pre-defined event.TCP/IP Transmission Control Protocol/InternetProtocol. Currently the most widely usedlayered transmission protocol for connectingdissimilar computers across networks.TDR Time Domain Reflectometer. A testdevice that acts on RADAR-like principles todetermine the location of metallic faults.Telco The Incumbent Local Exchange Carrier(ILEC) or the Competitive Local Exchange Carrier(CLEC).TFTP Trivial file Transfer Protocol. A simplifiedversion of FTP used to transfer files basedon UDP (User Datagram Protocol) with noguarantee of delivery. TFTP lacks passwordprotection and certain other capabilities of afull-featured FTP application.UUBR Unspecified Bit Rate. Used to describecertain ATM links.VVC Virtual Channel. An ATM communicationschannel; often used to mean any multiplexedpacket stream aggregated into a virtualcircuit.VCC Virtual Channel Connection. A concatenationof ATM VCLs. See VCL.VCI Virtual Channel Identifier. Numeric (16-bit) field in an ATM cell header that identifiesthe virtual channel the cell is to take.VCL Virtual Channel Link. A discrete end-toendATM connection that encompasses bothdirections of the data exchange. Analogous tothe Frame Relay PVC.$SSHQGL[)*ORVVDU\