2048kbit/s 30路脉码调制复用设备技术要求和测试方法
Performance andtest methods of the 30 channels pulse code modulation multiplex equipment at 2048 kbit/s
1995-12-21
GB/T 7254-1995
8448 kbit/s正码速调整二次群数字复用设备技术要求和测试方法
Performanceand methods of the second order digital multiplex equipment operating at 8448 kbit/s and using positive justification
1995-04-06
GB/T 11324-1995
139264kbit/s正码速调整四次群数字复用设备技术要求和测试方法
Performance and test methods of the fourth order digital multiplex equimpent operatingat 139264 kbit/s and using positive justification
1995-04-06
GB/T 9405-1995
34368kbit/s 正码速调整三次群数字复用设备技术要求和测试方法
Performance and test methods of the third order digital multiplex equipment operating at 34368 kbit/s and using positive justification