Specifications for synchronous digital hierarchy multiplex equipment 同步数字体系sdh复用设备技术要求
Generic specification for 64 32kbit s time division multiplex equipments 64 32kbit s时分复用设备通用规范
Digital multiplex equipment 数字复用设备
Methods of measurement for electronic performance of 64kbit s time division multiplex equipments 64kbit s时分复用设备电性能测量方法
Performance and test methods of the integrated multiplex equipment using in the digital channel 在数字信道上使用的综合复用设备进网技术要求及监测方法
Performance and test methods of 30 channels pulse code modulation multiplex equipment at 2048 kbit s 2048 kbit s 30路脉码调制复用设备技术要求和测试方法
Performance and test methods of the second order digital multiplex equipment operating at 8448 kbit s and using positive justification 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
From these figures we can see that the use of 155 mbits trunk ports in the switches simplifies the interface between the switching and transmission networks , reduces lots of multiplex equipment of 2 mbits tributary channels in the transmission network 图2交换机间155mbits端口互通类型二从图中可看出,交换中继端口采用155mbits后,交换和传输的接口简单了很多。
Moreover , look at the transmission machine room . the use of the 2 mbits interface requires a complete set of ddfs whereas the 155 mbits interface only requires a coaxial cabinet without the use of 2 mbits multiplex equipment , greatly reducing the occupancy of machine room space 再来看一下传输机房,采用2mbits接口,需要整列的数字配线架,而采用155mbits接口,只需要一个同轴柜,在传输设备一侧也不再需要2mbits的复用器设备,大大的减少了对传输机房的占用。