Specifications for synchronous digital hierarchy multiplex equipment 同步數(shù)字體系sdh復(fù)用設(shè)備技術(shù)要求
Generic specification for 64 32kbit s time division multiplex equipments 64 32kbit s時分復(fù)用設(shè)備通用規(guī)范
Digital multiplex equipment 數(shù)字復(fù)用設(shè)備
Methods of measurement for electronic performance of 64kbit s time division multiplex equipments 64kbit s時分復(fù)用設(shè)備電性能測量方法
Performance and test methods of the integrated multiplex equipment using in the digital channel 在數(shù)字信道上使用的綜合復(fù)用設(shè)備進網(wǎng)技術(shù)要求及監(jiān)測方法
Performance and test methods of 30 channels pulse code modulation multiplex equipment at 2048 kbit s 2048 kbit s 30路脈碼調(diào)制復(fù)用設(shè)備技術(shù)要求和測試方法
Performance and test methods of the second order digital multiplex equipment operating at 8448 kbit s and using positive justification 8448 kbit s正碼速調(diào)整二次群數(shù)字復(fù)用設(shè)備技術(shù)要求和測試方法
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 圖2交換機間155mbits端口互通類型二從圖中可看出,交換中繼端口采用155mbits后,交換和傳輸?shù)慕涌诤唵瘟撕芏唷?
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 再來看一下傳輸機房,采用2mbits接口,需要整列的數(shù)字配線架,而采用155mbits接口,只需要一個同軸柜,在傳輸設(shè)備一側(cè)也不再需要2mbits的復(fù)用器設(shè)備,大大的減少了對傳輸機房的占用。