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GB/T 3974-1983 Telephone transmission interference allowances for long-distance high-capacity analogue microwave communication systems (USD) via email in 1-3 business day
YD/T 1795-2008 Network Management Technical Requirements for 2GHz TD-SCDMA/WCDMA Digital Cellular Mobile Communications Network Element Direct connection Interface Function (USD) via email in 1-3 business day VALID
YD/T 2336.4-2017 Technical requirement for packet transport network management Part 4:EMS-NMS interface common information model via email in VALID please email coc@codeofchina.com for quotation
GB/T 17114-1997 Requirement for 160kbit/s subscriber line digital multigain equipment joined to national public telecommunication network via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
YD/T 1350.1-2005 Technical specification of Wavelength Division Multiplexing (WDM) system network management interface Part1: interface function part (USD) via email in 1-3 business day VALID
YD/T 1017-1999 Network node interface for the Synchronous Digital Hierarchy (USD) via email in 1-5 business day ABOLISHED
YD/T 1634-2007 Optical Transport Network Physical Layer Interfaces via email in ABOLISHED please email coc@codeofchina.com for quotation
GB/T 3384-1982 Parameters of interface for the analogue carrier systems over the network (USD) via email in 1-3 business day ABOLISHED
GB/T 2789-1981 Technical requirements for network interface for the analogue microwave relay communication systems via email in 1-3 business day please email coc@codeofchina.com for quotation
GB/T 11592-1989 Interface between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) for start-stop transmission services on public data networks (USD) via email in 1-3 business day ABOLISHED
YD/T 1021-1999 VB5.2 interface technical specification (USD) via email in 1-10 business day
GB/T 12171-1990 Specification for TDM/FDM60-channel transmultiplexing equipments used in the telecommunication network (USD) via email in 1-5 business day
YD/T 997-1999 Specification for VB5.1 interface (USD) via email in 1-10 business day
YD/T 910.1-1997 900/1800MHz TDMA digital cellular mobile telecommunication network man-machine of mobile station(Phase 2) (USD) via email in 1-8 business day VALID
YD/T 910.3-1997 900/1800 MHz TDMA Digital Cellular Mobile Telecommunication Network Technical Specification of Mobile Services Swiching Center-Base Station (USD) via email in 1-10 business day VALID
YD/T 842-1996 (USD) via email in 1-10 business day
YDN 108-1998 (USD) via email in 1-10 business day VALID
YD/T 855.3-1996 (USD) via email in 1-8 business day VALID
YD/T 1263-2003 Technical Requirements for Interworking of network Based on IP with traditional telecommunication network (USD) via email in 1-3 business day VALID
GF 005-1994 (USD) via email in 1-5 business day VALID
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