This device for comprehensive services of broadband access. With optical fiber link, this product can provide 4 channels of 10/100Base_T data interfaces, 4 channels of 2Mb/s(E1) and 16 subscriber interfaces, and the said subscriber interfaces include FXO、FXS、2/4 wire audio interface,2/4 wire EM,RS232/V.24,magnet telephone,hot-line,V.35.etc.

*Diversified interfaces for varied services of broadband and narrowband access
*Provide 4 channels 10/100Base_T interface, 4 channels of E1 interfaces and 16 channels of optional subscriber interfaces;
*The voice interface supports caller ID display;
*CCB payphone application with polarity reversal;
*Perfect indications of status are available to facilitate maintenance and management
* With small size and compact appearance, and easy for installation and operation.

Optical Interface
Bit Rate:155.52Mbps±20ppm
Code Type:NRZ+ scrambling code
Optical Transmitting Power:> -5dB ～-17dB
Receiving Sensitivity:> -36dB

E1(2Mb/s) interface
Standard E1 interface, conforms to the suggestion of ITU-T G.703, G.704, G.712:
Bit Rate:2048Kbps±50ppm
Code Type:HDB3
Interface Impedance:75Ω

Subscriber and loop interface(FXO, FXS, hot-line)
Impedance:600Ω
Insertion Loss:-3±0.75dB
Frequency Characteristic:300～3400Hz(-0.6～+3dB)
Weighted Noise:≤-63.7dBmop
Crosstalk Attenuation:≥65dB
Loop Impedance:≤1800Ω

2/4 wire audio interface (2/ 4 wire E&M interface)
Impedance:200Ω+680Ω||0.1μF
4 wire AD gain:14 dB(adjustable)
4 wire DA gain:-2 dB(adjsutable)
4 wire AD frequency characteristic:-0.2 - +0.2dB
2 wire AD frequency characteristic:-0.2 - +0.2dB
2 wire DA frequency characteristic:-0.2 - +0.2dB(adjustable)
Return Loss:40dB
Blance Degree:70dB
Common Mode Rejection Ratio(CMRR):70dB
Power Supply Rejection Ratio:30dB
Spare Signal Channel Noise:≥65dB
Loop Impedance:600Ω

RS232(asynchronous ) interface
Interface Type:V.24 asynchronous
Rate:0-19.2Kbps
RS232(synchronous) interface
Interface type: V.24 asynchronous (simplex or duplex)
Rate:4800bps, 9600bps,19200bps(optional)
Clock Mode:DCE or DTE

 V.35 interface
Interface Type:V.35 synchronous
Rate:Nx64Kb/s(N =1-30)
Clock Mode:DCE

10/100Base_T interface
Interface Type:10/100Base-T
Interface Rate:10M/100Mbps (self-adaptive)
Transmission Rate:100Mbps share (or specified bandwidth)