2024-12-21 13.58.75.125
Code of China Chinese Classification Professional Classification ICS Classification Latest Value-added Services

Code of China
Chinese National Standard List: Communication network number, signal and connection

YD/T 4161-2022 User Interface and Procedure Requirements for Number Portability 
  Issued on: 2022-9-30   Price(USD): 300.0
YD/T 4158-2022 Technical requirements of network interworking for number portability 
  Issued on: 2022-9-30   Price(USD): 330.0
YD/T 4163-2022 Technical Requirements for Non-Telecom Operators to Support Number Portability 
  Issued on: 2022-9-30   Price(USD): 195.0
SL 417-2016  
  Issued on: 2016-07-22   Price(USD): 300.0
GB/T 14733.4-2012 Terminology for telecommunication switching and signalling in telecommunication 
  Issued on: 2012-11-5   Price(USD): 870.0
GB/T 28505-2012 Technical specification of national No.7 signalling system 2 Mbit/s high speed link 
  Issued on: 2012-6-29   Price(USD): 330.0
GB/T 28500-2012 Technical requirements of 900/1 800 MHz TDMA digital cellular mobile network signaling system No.7 ISUP 
  Issued on: 2012-6-29   Price(USD): 1740.0
GB/T 28510-2012 Technical specification of stream control transmission protocol 
  Issued on: 2012-6-29   Price(USD): 990.0
GB/T 28524-2012 Media Gateway Control Protocol(MGCP) 
  Issued on: 2012-6-29   Price(USD): 1260.0
GB/T 28506-2012 Technical specification for national No.7 signalling system—GSM mobile telephone user part (MTUP) 
  Issued on: 2012-6-29   Price(USD): 990.0
GB/T 28503-2012 Technical requirements of adaptation layer of No.7 signalling interworking with IP MTP2 user adaptation layer 
  Issued on: 2012-6-29   Price(USD): 810.0
GB/T 28502-2012 Technical requirement of interworking between No.7 signalling and IP 
  Issued on: 2012-6-29   Price(USD): 600.0
YD/T 1522.4-2009 Technical Requirements for Session Initiation Protocol Part 4 SIPs Applications about call control Based on Softswitch Network 
  Issued on: 2009-6-15   Price(USD): 340.0
YD/T 1938.2-2009 Test method for Session Initiation Protocol (SIP) Part 2:SIPs Applications about Call Control Basedon Softswitch Network 
  Issued on: 2009-6-15   Price(USD): 780.0
YD/T 1522.31-2009 Technical Requirements for Session Initiation Protocol Part 3 Interworking between ISUP and SIP-Supplement 1 
  Issued on: 2009-6-15   Price(USD): 180.0
YD/T 1938.1-2009 Test method for Session Initiation Protocol (SIP) Part 1：Basic Session Initiation Protocol 
  Issued on: 2009-6-15   Price(USD): 4470.0
YD/T 1936-2009 Technical Requirements for Session Description Protocol 
  Issued on: 2009-6-15   Price(USD): 480.0
YD/T 1919-2009 Test Methods for V5.2 User Adaptation Layer 
  Issued on: 2009-6-15   Price(USD): 180.0
YD/T 1918-2009 Test Methods for the Adaptation Layer of ISDN Signalling Interworking with IP 
  Issued on: 2009-6-15   Price(USD): 750.0
YD/T 1684-2007 Technical Requirements and Testing Methods for the Billing of the Digital Cellular Mobile Telecommunication Network Point to Point Short Message Service 
  Issued on: 2007-9-29   Price(USD): 270.0
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