PCM30B multifunctional service equipment 19 inches wide and 1U high, multiplexing 4× E1, 10/100Base_T Ethernet and PCM30 into single optical interface. Various interfaces: FXS, FXO, 2/4WE & M, V11, V24/RS232, etc.. 15× 2 unit cards for total 30 channels of max accomodation. Slide-down design for front panel. DC48V power feeding, all modules can be charged without plug-out.