30 FXS FXO to E1 PCM multiplexer POTS voice mux, DLC telephone extender voice over E1 mux, E&M, RS232, V. ... 35, Ethernet, G64K.. 30 FXS FXO POTS voice over E1 PCM multiplexerGENERAL INFORMATIONThe products 30 FXS/FXO to ... although in power outage.4, Up-link is the voice equipment of E15, There are 30 channels of telephone ... 19 inch standard cabinet) 30 FXS FXO POTS voice over E1 PCM multiplexer