PCM multiplexer 30 FXS FXO to E1 POTS voice mux, DLC telephone extender voice over E1 mux, E&M, RS232, V.35, Ethernet, G64K PCM multiplexer 30 FXS FXO POTS voice over E1 GENERAL INFORMATIONThe products 30 FXS/FXO to E1 provide 30 channels of telephones with reversed polarity charging function and caller ID display function, with upstream E1.PRODUCT CHARACTER:1, Complete alarm signals, shown by ...