... E1 1~30 FXO FXS RS232 V35 Eth G64K E&M voice mux, telephone extender, voice multiplexer, DLC PCM multiplexer POTS ... with 1~30( FXO FXS RS232 V35 ETH G64K E&M )GENERAL INFORMATIONPCM-30 Multiplexer provides 1 to 30 lines optional ... +70Humidity95% Dimension: --- 42.8cm × 21.6cm × 4.8cm (can be mounted on 19 inch standard cabinet) PCM multiplexer with (1~30 ...