Unframed E1 Fiber Modem

This device provides one E1 interface and one optical interface to achieve interface conversion, rate conversion, and timeslot extraction from E1 to Optical. When unframed mode, the data channel rate is 2.048Mbps. The device has an inter-set loop test function to facilitate the project launching and daily maintenance.

● Based on self-copyright IC 

● Can detect the reason for optical signal loss is that the device power-off or transmission fiber is broken, and indicated on LED

● Provide 2 impedances: 75 Ohm unbalance and 120 Ohm balance;

● After strict testing and a practical verification system, completely comply with protocol ITU-T V.35, G.703, G.704

● Have three Loop Back Mode: E1 interface Loop Back (ANA)、35 interface Loop Back(DIG)、Command the remote V.35 interface Loop Back(REM) 

● Have pseudo-random code test function, easily line opened, can be used as a 2M BER Tester
● AC 220V, DC-48V, DC+24V, DC Power and Polarity-Free

●  Fiber

 Multi-mode Fiber

50/125um, 62.5/125um,

Maximum transmission distance: 5Km @ 62.5 / 125um single mode fiber, attenuation (3dbm/km)

Wave Length: 820nm

Transmitting power: -12dBm (Min) ~-9dBm (Max)

Receiver sensitivity: -28dBm (Min)

Link budget: 16dBm

Single-mode Fiber

8/125um, 9/125um

Maximum transmission distance: 40Km

Transmission distance: 40Km @ 9 / 125um single mode fiber,attenuation (0.35dbm/km)

Wave Length: 1310nm

Transmitting power: -9dBm (Min) ~-8dBm (Max)

Receiver sensitivity: -27dBm (Min)

Link budget: 18dBm

●  E1 Interface

Interface Standard: comply with protocol G.703;

Interface Rate: 2048Kbps;

Interface Code: HDB3;

E1 Impedance: 75Ω (unbalance), 120Ω (balance);

Jitter tolerance: In accord with protocol G.742 and G.823

Allowed Attenuation: 0~6dBm

●  Working environment

Working temperature: -10°C ~ 50°C

Working Humidity: 5%~95 % (no condensation)

Storage temperature: -40°C ~ 80°C

Storage Humidity: 5%~95 % (no condensation)