【正文】 rminating Equipment / Distributing Frames Equipment to provide the termination point for voicegrade and voicegrade patible facilities and equipment in a central office. It is posed of protectors, connectors and terminal strips or blocks. Distributing frames are categorized as either conventional or modular. ? Tall conventional distributing frames ? LowProfile Conventional Distribution Frames (LPCDFs) ? Conventional protector frames ? Combined Main Distributing Frame (CMDF) ? Subscriber Main Distributing Frame (SMDF) ? Trunk Main Distributing Frame (TMDF) ? Intermediate Distributing Frame (IDF) ? TiePair Distributing Frame (TPDF). ? Office repeater bays Digital Subscriber Line (DSL) Equipment for the transport of highspeed digital data on the embedded copper plant. DSL typically will operate over nonrepeatered, POTSlike, conditioned unloaded loops out to CSA ranges. This product category includes central office and remote units, regenerators or range extenders, and supporting equipment. ? ISDN ? HDSL ? ADSL ? DDS 企業(yè) () (大量管理資料下載 ) Note 1:Product Categories listed in RED and italicized will be used for possible Data Aggregation only. Metrics must be submitted per the lower Product Category listing. Note 2:Remember that the following Metrics (FRT, OFR amp。 OTD) are applicable and required for all product categories. TL 9000 質(zhì)量管理體系測(cè)量手冊(cè) A8 Table A1. Product Category Definitions Category Code Category: Definition: Examples: ? Pedestals ? Microwave / radio towers Conduits Channels for the containment of optical fiber or metallic cable. ? Innerduct ? Multibore conduit ? PVC pipe Transport Equipment Equipment located in the central office or at the customer premises, but inside the work demarcation point, for the transmission of digital or analog munication over transmission media. This product category includes equipment for terminating, interconnecting, and multiplexing munications circuits. Cross Connect Systems Equipment to provide a physical termination point for physical cables and individual conductors. They can be manual or automated, metallic or optical. Crossconnect systems, such as distributing frames, Digital Signal Cross Connects (DSXs) and Fiber Distributing Frames (FDFs) provide the following basic functions: crossconnection of work distribution facilities and equipment in the central office, electrical protection for conductive media, test access, temporary disconnection, and termination points for facilities and equipment. ? Digital Signal Cross Connect (DSX) ? Digital Interface System (DIS) ? Fiber Distribution Frame (FDF) ? Feeder Distribution Interface (FDI) ? Digital Crossconnect System (DCS) ? Electronic DSX ? Optical DSX ? Optical Interface Systems Carrier Systems / Multiplexers Equipment for transmitting multiple munication channels over a single transmission facility. This category includes equipment for transmission over interoffice trunks, for example, from central to remote offices. Interoffice / Long Equipment for transmission between central offices, between 企業(yè) () (大量管理資料下載 ) Note 1:Product Categories listed in RED and italicized will be used for possible Data Aggregation only. Metrics must be submitted per the lower Product Category listing. Note 2:Remember that the following Metrics (FRT, OFR amp。 OTD) are applicable and required for all product categories. TL 9000 質(zhì)量管理體系測(cè)量手冊(cè) A6 Table A1. Product Category Definitions Category Code Category: Definition: Examples: Outside Plant The part of the telemunications that is physically located outside of telephone pany buildings. This includes cables, supporting structures, and certain equipment items such as load coils. Microwave towers, antennas, and cable system repeaters are not considered outside plant. Transmission Medium Optical fiber, metallic cable, or other physical medium for the transmission of analog or digital munications. Metallic Products Metallic as opposed to optical or wireless transmission media. Metallic Conductor Cable Metallic pairs of conductors housed in a protective cable ? Metallic cable ? Central office coaxial cable ? Hybrid coaxial/twisted pair drop Metallic Connectors Devices used to terminate a metallic cable. ? Coaxial connectors ? Coaxial distribution connectors Optical Fiber Products Optical, as opposed to metallic or wireless transmission media. Optical Fiber A glass fiber wherein light is propagated and any associated covering. ? Multimode fiber ? Standard single mode Fiber ? Dispersion shifted fiber ? Nonzero dispersion shifted fiber ? Loose tube cable ? Central tube cable Optical Connectors Device used to terminate an optical cable ? Optical SC,ST, or MT connectors ? Connectorized cable 企業(yè) () (大量管理資料下載 ) Note 1:Product Categories listed in RED and italicized will be used for possible Data Aggregation only. Metrics must be submitted per the lower Product Category listing. Note 2:Remember that the following Metrics (FRT, OFR amp。 OTD) are applicable and required for all product categories. TL 9000 質(zhì)量管理體系測(cè)量手冊(cè) A4 Table A1. Product Category Definitions Category Code Category: Definition: Examples: Router source to destination. Routing generally uses software algorithms to optimize one (1) or a bination of datatransport “metrics” such as delay, the use of reliable paths, “hops” between servers, etc. Switching is generally faster than routers since the decision as to where to send the packet is done by hardware, but are also limited to less sophisticated algorithms than are routers to determine which path the packets should use. Most systems provide