The subscriber interface type is multiple (including voice, data and image), which all are assembled in the motherboard with the mode of small-scale modularization parts, and various subscriber modules can implement the mixed assembly.

Providing reverse-polar signaling is used for the real-time charging, which has the centralized monitoring function and is convenient for the subscriber’s maintenance and management.

Provide the optical fiber line interface module, and directly use the optical fiber to implement transmission.

　　
Technical Features:
　High density single-board design can improve the reliable performance of system
　Providing optional reverse-polar signal is convenient for the subscriber’s precise charging
　Provide 1~30 voice interfaces, customize according to requirements
　Independent subscriber module design can implement the mixed insertion according to the subscriber’s 　requirements
　Multi-subscriber interface can realize the mixed access of voice, data and image
　Centralized network management is convenient for the subscriber’s maintenance and management
　1U-height 19-inch chassis structure can reduce the space occupied in equipment room

YKPCM30 interface part:
　2/4-wire audio interface board
　Analog subscriber line interface
　Loop trunk interface
　E&M interface
　RS232/V.24 interface
　V.35 interface
　10Base_T interface
　G.703 64Kb/s Codirectional data interface

Main Technical Indexes
　 E1interface
　　Frequency:2.048Mbps ±50ppm
　　Reference standard :ITU-T G.703/G.704
　　Line code :HDB3
　　Physical interface :BNC for 75Ω
　　Jitter characteristics:ITU-T G.823

　 2/4-wire audio interface board
　　 Compression ratio :ITU-T G.711A Law
　　 Impedance: balance 600Ω
　　 Frequency range :300～ 3400Hz
　　 2-wire input relative level :0～ -5dBr
　　 Output relative level :-2～ -7dBr
　　 4-wire input relative level :-14dBr
　　 Output relative level :+4dBr
　　 Return loss: not less than 20dB

　 Asynchronism data interface
　　 Reference standard :RS-232
　　 Rate:19.2Kbps following
　　 Data Format :Adaptive
　　 Stopped spaces :Adaptive
　　 Testing method :Adaptive
　　 Physical interface :RJ-11

　 Ethernet interface
　　 Reference standard :IEEE 802.3
　　 Physical interface:Ethernet RJ45
　　 LAN address:10000
　　 Codirectional data interface
　　 Reference standard :RS232/X.21/E1A530/V.35
　　 Rate:N×64Kbps N=1..31
　　 Clock mode:System Clock or Interface Clock
　　 Physical interface:M34

　 Power supply
　　 Input:-48V(±20%)or 220V AC
　　 Output:±5V(±5%) ringing current 75V AC
　　 Power:≦7W(full capacity)