1.PCM fiber optical multiplexer equipment 2.E1 port can be 75Ohm or ... 64E1 2048×2048 non-blocking cross-connect channel PCM equipment or D/I device.-Completely modular design. The ... 2 wire E/M, 4 wire E/M, telegraph, V.35, V.24/V.28, 64K, N×64K, Ethernet subchannel card. E1 ... *Environmental Requirements-Power supply: -48 VDC +-15%-Fully equipment power consumption: 50W+-10%-Operating temperature: 0ºC~45 ...