译：GB/T 19856.2-2005 Lightning protection—Telecommunication lines—Part 2:Lines using metallic conductors

译：GB/T 19856.1-2005 Lightning protection—Telecommunication lines—Part 1:Fibre optic installation

译：GB/T 19516-2004 The specifications of wired-emergency telephone system of expressway

译：GB/T 7611-2001 Characteristics of the electrical interface at hierarchical bit rate for digital network

译：GB/T 18498-2001 Interworking between packet switched public data networks and public maritime mobile satellite data transmission systems

译：GB/T 11593-2001 Interface between data terminal equipment and data circuit-terminating equipment for synchronous operation on public data networks

译：GB/T 18119-2000 Video coding for low bit rate communication

译：GB/T 11596-1999 DCE/DTE interface for a start-stop mode data terminal equipment accessing the packet assembly/disassembly facility (PAD) in a pubic data network situated in the same country

译：GB/T 11598-1999 Packet-switched signalling system between public networks providing data transmission services

译：GB/T 13621-1999 Capacity series and radio-frequency channel arrangement and equipment main technical specifications for 100～1000MHz radio relay communication systems

译：GB/T 11591-1999 Packet assembly/disassembly facility(PAD) in a public data network

译：GB/T 17904.1-1999 ISDN user-network interface data link layer specification and conformance testing method—Part 1:User-network interface data link layer specification

译：GB/T 17904.2-1999 ISDN user-network interface data link layer specification and conformance testing method—Part 2:Data link layer protocol conformance testing method

译：GB/T 11595-1999 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 by dedicated circuit

译：GB/T 11597-1999 Procedure for the exchange of control information and user data between a packet assembly/disassembly (PAD) facility and a packet mode DTE or another PAD

译：GB/T 17801-1999 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 network or an integrated services digital network or a circuit switched public data network

译：GB/T 11590-1999 International data transmission services and optional user facilities in public data networks and ISDNs

译：GB/T 11589-1999 International user classes of service in, and categories of access to, public data networks and integrated services digital networks(ISDNs)

译：GB/T 17789-1999 Procedures for simultaneous transmission of data and digitally encoded voice signals over the PSTN or over 2-wire leased point-to-point telephone type circuits

译：GB/T 17114-1997 Requirement for 160kbit/s subscriber line digital multigain equipment joined to national public telecommunication network