E3/DS3/STS-1 Fiber Modem

The function of E3/DS3/STS-1 optical fiber MODEM is to directly modulate E3/DS3/STS-1 data signal to single-mode or multi-mode optical fiber with a transmission rate of E3(34.368Mbps±20ppm)/DS3(44.736Mbps±20ppm)/STS-1(51.84Mbps±20ppm), which can be used as a channel for E3/DS3/STS-1 data.

● Based on self-copyright IC

● Integrated Transmitter, Receiver, and Jitter Attenuator for DS3, E3, and STS-1

● Provide two fiber interface 1+1 protect（APS） functions, one is the Main fiber port, and the other is the backup port(Optional).

● Provide 75 Ωunbalance coaxial cable,B3ZS/HDB3 decoding, and loss-of-signal monitoring.

● After strict testing and a practical verification system, completely comply with protocol ITU-T G.703, G.7

● Have three Loop Back Mode: Fiber interface Loop Back (ANA)、E1 interface Loop Back(DIG)、Command the remote E1 interface Loop Back(REM)

● Have pseudo-random code test function, easily line opened, can be used as a BER Tester

● AC 220V, DC-48V, DC+24V, DC Power and DC-48V/DC24V power has polarity automatic detection function, you can install the device without differentiation between positive and negative polarity.

● Fiber          

Optical port：1 , 2(1+1)

Optical Fiber： Single/Dual fiber

Fiber interface： FC/SC/ST/LC(SFP)

Wavelength：850nm/1310nm Multimode；1310nm/1550nm Single mode

Relay-free transmission distance: 20~120Km

Typical transmit power:

Single mode1310/1550nm：≥-9dB

Multimode850nm：-18dBm

Multimode1310nm: -25dBm

Receive sensitivity range：-28dBm~- 40dBm

Physical Interface: RJ45 Support Auto-MDIX

● E3/DS3/STS-1  interface   

Standard:      Conform to ITU-T G.703 G.751

Code rate:     E3(34.368Mbps±20ppm)

DS3(44.736Mbps±20ppm)

STS-1(51.84Mbps±20ppm)

Code type:    B3ZS(DS3,STS-1)/HDB3(E3)        

Impendence:  75Ω（unbalance）

Connector:   BNC（unbalance）

Cable at Lengths: 75 Coaxial Cable Up to 380m (DS3),      440m (E3), or 360m (STS-1) 

● Working environment  

Operating temperature：-10℃—+60℃ 

Storage temperature：  -40℃—+85℃

Working humidity：    0%—95% (No condensation）

MTBF：    ＞100,000 hour