IDM GTD442’S fiber interface rate is 2.5G, can provide 2 wire speed 1000M Ethernet ports, each line speed 1000M interface has a electrical GE and an optical GX; also can provide 18 E1 bandwidth of transmission channel. IDM GTD442 in the transmission line interface provides up to two groups of optical fiber interface, constitute a backup, or light chain network, ring network etc.. In the user interface, can provide 4 groups Ethernet ports, 4 channels phone, 2 channel RS485 or 1 RS422
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