【正文】 a bination of routing and switching, as appropriate, to best serve the needs of the user. Asynchronous Transfer Mode (ATM) Switch Switching equipment which operates at OSI Level 2 (hardware layer) to move fixedlength (53byte) data cells from source to destination over virtual paths or channels. ATM is designed to support mixed data types (voice, video, puter munications, etc.), provides selectable Quality of Service guarantees and easily enables billing for data switching services. Throughput of up to 622 Mbps is monly available in ATM Switches. Frame Relay Switch Switching equipment which operates at OSI Level 2(hardware) to move variablelength Frame Relay Frames over virtual circuits from source to destination. Data are moved without data integrity checks or flow control at up to T3 rates. 2 Signaling Equipment for the provision of signaling, ., states applied to operate and control the ponent groups of a telemunications circuit to cause it to perform its intended function. Generally speaking, there are five (5) basic categories of signals monly used in the telemunications work. Included are supervisory signals, information signals, address signals, control signals, and alerting signals. This category includes those signaling products that function within the telemunications work and excludes (possibly similar) products which would normally provide enhanced services outside the work, or on the customer premises such as ACD, IVR, or voice messaging systems. Service Control Point (SCP) A signaling point that functions as a database to provide information to another SCP or Service Switching Point (SSP). Transaction Capabilities Application Part ? Service Control Point ? Service nodes 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。 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 A3 Table A1. Product Category Definitions Category Code Category: Definition: Examples: 1 Switching Equipment for the physical or virtual interconnection of munication channels in response to a signaling system. The switching category is broadly defined to include packet or circuit switched architectures. Circuit Switch Equipment for the termination of subscriber lines and/or trunk lines and the dynamic interconnection of these ports or channels in a digital transmission facility. A circuit switch establishes a dedicated circuit, as opposed to a virtual circuit, in response to a signal. Stored Program Control (SPC) is the most mon type of switching equipment used at end offices and tandem offices. These systems use either analog or digital switching. The switching system used must have the capability to send, receive and be actuated by signals, ., access line signals, or interoffice inband or monchannel signaling. This category includes all circuit switches regardless of transmission medium, ., wireline, or wireless. ? Endoffice ? Tandem ? Tandem access ? Remote ? Service Switching Point [SSP] ? Mobile Switching Center [MSC] Packet Switch Equipment for switching or routing data on virtual, as opposed to dedicated, circuits. The service is packet switched in that the customer’s data is transported as a sequence of data blocks (packets) that do not exceed a specified size. This packetization permits data from many data conversations to share a given transmission facility economically through statistical multiplexing. Such data conversations are known as virtual circuits, which are full duplex and connectionoriented. Public Packet Switched Network (PPSN) Equipment for the provision of connectionoriented, packetswitched munication services designed to provide economical data transport based on internationally standardized packet protocols. The packet switch is the primary switching element of the work allowing efficient connectivity to many customers. The access concentrator concentrates traffic from lowerspeed access lines for more efficient packetswitch port usage and performs any necessary protocol conversion via the Packet Assembler/Disassembler (PAD) function. ? packet switch ? Access concentrator / PAD IP Packet Switch / Equipment which moves variablelength IP (Inter Protocol) packets from 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 A5 Table A1. Product Category Definitions Category Code Category: Definition: Examples: (TCAP) queries and responses are used to municate with the SCP as is done for 800 Data Base Service and ABS. SCPs may support one (1) or more services per SCP and SCPs may be deployed singularly as standalone nodes, as mated pairs, or as multiple replicates (more than 2) to increase their availability. SCPs, connected to STPs, are associated with applications that consist of servicespecific software and a database of customerrelated information. This product category includes conventional SCP equipment, plus other platforms such as service nodes, intelligent peripherals, or service resource facilities, which may bine capabi