Detail of YD/T 729-1994

Introduction of YD/T 729-1994

1 Subject Content and Applicable Scope This standard specifies the uniform requirements of inspection method for networking of subscriber exchange and on-line quality tracing. This standard is applicable to digital programmable subscriber exchange and analog programmable subscriber exchange. 2 Reference Standard GB 3971.2 Interoffice Junction Digital Line Signaling System for Telephone Automatic Switching Network GB 3377 Multi Frequency Register Signaling System for Telephone Automatic Switching Network GB 3378 Subscriber Line Signaling System for Telephone Automatic Switching Network GB 3379 Interoffice Direct Signaling System for Telephone Automatic Switching Network GB 7611 Parameters of Digital Interface for PCM Systems over Telecommunication Network GB 6879 Technical Requirements of the 30 Channels Pulse Code Modulation Multiplex Equipment at 2048 kbit/s GF 002 General Technical Specification for Telephone Switching Equipment of Ministry of Posts and Telecommunications YD 344 Requirements for PABXs Access to Public Telephone Switching Network 3 Conditions of Public Test 3.1 Testing interface shall be subject to the interface terminal of distribution frame exchange and various operation system errors shall be deducted. 3.2 Before testing, public ground wire shall be prepared and power supply "+" shall be connected to the ground. 3.3 Reference frequency for reference: digital exchange 1020Hz; analog exchange 800Hz. Reference level for reference: digital exchange -10dBm0; analog exchange 0dBm. 3.4 All tests shall be conducted under the required conditions of impedance matching. 3.5 25~35mA of operating current is generally selected for testing. 3.6 Each parameter of transmission indexes is tested for four times, the worst value will be taken as the result and the unqualified indexes (if any) shall be doubly tested. 3.7 Testing shall be conducted under normal operation environment. 3.8 The adopted instruments and equipment shall be within the validity of metering qualified. 4 Interface Testing

Contents of YD/T 729-1994

1 Subject Content and Applicable Scope 2 Reference Standard 3 Conditions of Public Test 4 Interface Testing 5 Test of Main Exchanging Performance and Business Performance 6 Test for Prefix of Networking and Serial Number 7 Test of Transmission Parameter 8 Test for Signaling 9 Test for Service Quality Index 10 Verification for Accounting Functions and Accuracy 11 Network Synchronization Test 12 Test for Operating Requirements 13 Test for Power Supply Limitation and Noise 14 Test for Protective Property of Over-voltage and Over-current as well as Safety Protection 15 Ambient Conditions Appendix A Additional Explanations