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 wire 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 antipole signal is convenient for the subscriber’s precise charging
　Provide 1~30 multi-service 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 structure can reduce the space in equipment room

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

Main Technical Indexes

Telephone Interface:
　Telephone interface: speech channel characteristics conform to General Technical Specifications of Telephone Exchange Equipment of Ministry of Post and Telecom
a) Impedance ：600Ω
b) Insertion loss ：-3±0.75dB
c) Frequency characteristics ：300～3400Hz(-0.6～+3dB)
d) Weighted noise ：≤63.7dBmop
e) Crosstalk attenuation ：≥65dB
f) Subscriber wire loop resistance: less than 3KΩ (including telephone)
g) Feed voltage ：48V；
h) Feed current ：20~50mA；
i) Ringing current ：AC90 plus or minus 15V

E1interface
Frequency:2.048Mbps ±50ppm
Reference standard :ITU-T G.703/G.704
wire 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

Synchronous 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 consumption:≦7W(full capacity)