Solution Description: 

6U 13 slots chassis type centralized PCM multiplexer is placed in the center office, total capacity can reach 13 direction , totally can reach to 390 ports POTS phone voice(FXS/FXO) access , the chassis down output 1-13 E1 interface, transmit to the client side through SDH/PDH/ATM network, client side put 30* POTS voice(FXS,FXO) E1 multiplexer, access 1-30 channels voice (POTS,FXS,FXO) . 

Equipment support SNMP network management,while operating network management, 6U chassis can plug 1 SNMP card + 12 PCM cards in 12 directions, totally 360 ports POTS phone voice (FXS/FXO) access.