4E1 PDH optical transceiver 19 inch rack type single fiber transmission 20km E1 interface optical network optical transceiver

HY-4E1 PDH Optical transceiver , It is a point-to-point optical transmission equipment developed by Hanyuan high tech on the basis of VLSI . Provide 1~4 road E1 Interface , One line of digital business telephone is available , The application is very flexible . It has perfect alarm function , The whole machine is stable and reliable , Low power consumption , High integration , Small volume .

  Functional characteristics
◆ Integrated circuit based on independent intellectual property rights ;
◆ Modular wide dynamic photodetector ;
◆E1 The interface conforms to G.703 Suggest , It adopts fully digital clock recovery and smooth phase-locked technology ;
◆ All the way PCM Digital business telephone （ Optional ）;
◆ It can detect that when the optical signal is lost, the opposite end equipment is powered off or the optical fiber is disconnected , And indicate the alarm through the indicator lamp ;
◆ It has the function of viewing and displaying the working status of remote devices at the local end ;
◆ Provide command remote interface loopback function , Convenient for line maintenance ;
◆ The transmission distance without relay can reach 2-120 km ;
◆ Multiple power supply modes are optional ：AC220V、DC-48V/DC24V etc. ;
◆DC-48V/220VAC The power supply has the function of automatic polarity detection , There is no need to distinguish between positive and negative poles during installation .

Technical parameters
◆ Optical fiber part
Smooth mouth ：1
Optical fiber ： Single fiber and double fiber
Fiber optic interface ：FC/SC/ST
wavelength ：850nm/1310nm multimode ;1310nm/1550nm Monomode
No relay transmission distance ：20~120Km
Typical transmit power ：
Monomode 1310/1550nm：≥-9dBm
multimode 850nm：-18dBm
multimode 1310nm：-25dBm
Acceptable sensitivity range ：-28dBm~-40dBm
◆E1 Interface
Device interface ： The equipment interface conforms to ITU-T G.703 Suggest
rate ：2048Kb/s±50ppm
Code type ：HDB3
impedance ： Unbalanced 75Ω/ Balanced 120Ω
Unbalanced coaxial adapter , To fit 75-2/3 Coaxial cable
Jitter characteristics ： Satisfy ITU-T G.742、G.823 Suggest
The input port allows attenuation ：0～6dBm
◆FXS Business telephone interface
Ringing voltage ：75V
Ringing frequency ：25Hz
Two wire input impedance ：600Ω( Off hook )
Return loss ：20dB
◆ Electrical and mechanical characteristics
System power supply ：AC180V～260V;DC～48V;DC+24V
Power waste ：≤10W
Appearance and structure ：485X140X45mm;19 Inch 1U Rack
◆ Environmental indicators
working temperature ：-20℃～+70℃
Storage temperature ：-40℃～+85℃
Working humidity ：0%～95%（ No condensation ）
MTBF：＞100000 Hours