... DXC-4E1 is HWATEL Modular Multi Service Access with enhance cross connect matrix family, 1U shelf ... or 1 port V.35 port selectable, 8 lines FXS/O, 1 port RS232 PCM8F-4EE: ... 4 ports E1, 1 port 100M Ethernet, 8 lines FXS/O, 4 port RS232 PCM4: E1 uplink ... up to up to 420 lines service channel. Standard 19 inch 6U with 16 slot, support up to ... I/O module pcm multiplexer with 30 lines FXS FXO RS232 Ethernet