| 单词 | X Series |
| 释义 | X Series Table X-3: Select X Series Recommendations (continued) Recommendation Description X.21bis Use on public data networks of Data Terminal Equipment (DTE) which is designed for interfacing to synchronous V-Series modems X.25 Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and connected to public data networks (PDNs) by dedicated circuit X.28 DTE/DCE interface for a start-stop mode Data Terminal Equipment accessing the Packet Assembly/Disassembly (PAD) in a public data network (PDN) situated in the same country X.29 Procedures for the exchange of control information and user data between a Packet Assembly/Disassembly (PAD) and a packet mode DTE or another PAD X.31 Support of packet mode terminal equipment by an ISDN X.32 Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and accessing a packet-switched public data network through a public switched telephone net- work (PSTN) or an integrated services digital network (ISDN) or a circuit-switched public data network (PDN) X.75 Packet-switched signaling system between public networks providing data trans- mission services X.121 International numbering plan for public data networks (PDNs) X.122 Numbering plan interworking for the E.164 and X.121 numbering plans X.140 General quality of service parameters for communication via public data net- works (PDNs) X.141 General principles for the detection and correction of errors in public data net- works (PDNs) X.142 Quality of service metrics for characterizing frame relay/ATM service interworking performance X.144 User information transfer performance parameters for public frame relay data networks X.145 Connection establishment and dis-engagement performance parameters for pub- lic frame relay data networks providing SVC services X.146 Performance objectives and quality of service classes applicable to frame relay X.147 Frame relay network availability X.148 Procedures for the measurement of the performance of public data networks (PDNs) providing international frame relay service X.149 Performance of IP networks when supported by public frame relay data networks X.151 Frame relay operations and maintenance — Principles and functions X.200 Information technology — Open Systems Interconnection (OSI) - Basic Reference Model: The basic model X.300 General principles for interworking between public networks and between public networks and other networks for the provision of data transmission services X.400 Message handling services: Message handling system and service overview 74570c24.qxd 9/11/07 12:37 PM Page 553 |
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