【正文】 lities of a SCP, SSP or which may be used to provide AIN functionality or other enhanced services within the work. ? Service resource facilities Signaling Transfer Point (STP) A signaling point with the function of transferring signaling messages from one signaling link to another and considered exclusively from the viewpoint of the transfer. An STP is a specialized routing signaling point (SP). It is an SS7based packet switch that transfers SS7 messages to and from other SPs and is always deployed in mated pairs for reliability. The STP uses the Message Transfer Part (MTP) and the Signaling Connection Control Part (SCCP) of the SS7 protocol to screen and route messages destined for other nodes in the SS7 work. It functions as an SS7 work routing hub, interfacing with SPs only through SS7 links and not voice or data trunks. Within the LEC CCS work structure, STPs are architecturally referred to as either Local STPs (LSTPs) or Regional STPs (RSTPs). Home Location Register (HLR) Equipment to provide a permanent database used in wireless applications to identify a subscriber and to contain subscriber data related to features and services. It stores information such as service profiles, location and routing information for roamers, service qualification, interface for moves, adds and changes. It municates with other HLRs and provides access to maintenance functions such as fault information, performance data, and configuration parameters. 3 Transmission Equipment for the connection of the switched and interoffice works with individual customers. An integral part of the distribution work is the loop, which connects the customer to the local central office (CO), thus providing access to the interoffice work. 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)量管理體系測量手冊 A7 Table A1. Product Category Definitions Category Code Category: Definition: Examples: assemblies, ., optical fiber ribbon fanouts Transmission Components Components embedded in the transmission medium other than cable or connectors Active Components Metallic ponents containing electronics ? Coaxial drop amplifiers ? Fiber optic data links Passive Optical Components Optical ponents containing no electronics ? Wavelength Division Multiplexer [WDM] ? Add drop multiplexers ? Fiber optic dispersion pensators ? Optical isolators ? Filters ? Attenuators Ancillary Equipment Other transmission ponents not specifically covered in other transmission ponent categories. Typically passive. ? Surge protectors ? Bonding and grounding hardware ? Taps Physical Structure Equipment for the support of telephone transmission media. These physical structures include poles, towers, conduits, equipment enclosures such as huts. Enclosures Enclosures for work equipment located in the outside plant. ? Fiber optic splice enclosures ? ONU enclosures ? Organizer assemblies ? Seal assemblies ? Controlled environment Vaults Support structures Products for the physical support of transmission media or enclosures. ? Telephone poles 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)量管理體系測量手冊 A9 Table A1. Product Category Definitions Category Code Category: Definition: Examples: Haul exchanges, or between carriers, as opposed to transmission between an end office and a remote location, typical of a loop carrier. Metallic Carrier System Carrier system that uses metallic transmission medium. ? Analog carrier (N,L carrier) ? D4, D5 digital carrier Optical Carrier System Carrier system that uses optical transmission medium. SONET / SDH Transport Systems Fully featured digital transmission system employing optical medium ? OC3, 12, 48, or 192 SONET equipment configurable as linear or ring. ? Similar for STMx SDH equipment WDM / DWDM / Optical Amplification Products Shelf level subsystems used for multiplexing, demultiplexing, or amplification of optical signals. Lack the built in protection, electrical conversion and other features of a SONET Transport System. ? Wavelength Division Multiplexer [WDM] ? Dense Wavelength Division Mulitplexer Microwave Carrier system that employs fixed microwave transmission. ? 6, 8, 11, or 18 gigahertz microwave radio Loop Carrier Equipment for deploying multiple voice or digital channels over fewer physical channels than would be otherwise required (a “pair gain” function). ). Loop carriers are typically digital systems which employ timedomain multiplexing (TDM) but may include analog systems as well. Loop carrier systems consist of a Central Office Terminal (COT) located near the switching system, a Remote Terminal (RT) located near the customer to be served and a transmission facility connecting the COT to the RT. Individual munications circuits (such as POTS and Foreign Exchange [FX]) are accepted as separate inputs at the COT (RT), timedivision multiplexed (in a digital loop carrier) by the loop carrier system and reproduced at the RT (COT). ? Digital loop carrier (DLC) ? Universal digital loop carrier (UDLC) ? SLC remote terminal ? Integrated digital loop carrier ? Analog loop carrier 企業(yè) () (大量管理資料下載 ) Note 1:Product Categories liste