YD/T 638.12-1993 Methods for Naming Models of Communication Measuring Instruments

YD/T 638.1-1993 The general rules for the naming method of telecommunications industry products YD/T 638.2-1993 Naming Method for Optical Communication Equipment Models YD/T 638.5-1993 YD/T 638.5-1993 is the name-giving method for telephone exchanges YD/T 638.6-1993 The naming convention for telecommunications equipment YD/T 638.7-1993 Carrier communication equipment model naming convention YD/T 638.8-1993 The model naming convention for fax communication devices and office automation equipment YD/T 638.10-1993 The naming method for wireless, microwave, and satellite communication equipment models YD/T 638.11-1993 Digital communication equipment model naming convention YD/T 638.13-1993 Telephone switching equipment model naming convention YD/T 638.14-1993 Telephone Model Naming Method