4E1 PDH Fiber Multiplexer JHA-CPE4m Overview This device provides 1-4* E1 interface , Standard 2 wire telephone as engineering order-wire (optional). It is very flexible. It has alarm function. The work is reliable, stable, and low power consumption, high integration, small size. Product Photo   Front Panel 75 ohm Back Panel 120 ohm Back Panel Features Based on self -copyright IC Modular wide dynamic optical detector Uses standard 2 wire telephone (non-telephone handles) set as engineering order-wire hotline(optional) E1 interface comply with G.703, adopts digital clock recovery and smooth phase-lock technology When optical signal lost, it can detect the remote device is power off or fiber is disconnected, and indicates alarm by LED The local device can view the remote device working condition Provide command the remote interface Loop Back, ease line maintenance The transmission distance is up to 2-120Km without interruption AC 220V, DC-48V, DC+24V can be optional DC-48V/DC+24V power supply with automatic polarity detection function, when installed without distinction between positive and negative Parameters ♦   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±50ppm;  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) Specifications Model Model Number:JHA-CPE4m Functional Description 4E1 PDH，order wire phone, Desk-Top Type，（Standard telephone interface, non-telephone handles） Port Description One optical port，4 E1 interface (75/120 ohms) Power Power supply: AC180V ~ 260V；DC–48V；DC+24VPower consumption: ≤10W Dimension Product Size: Desk-Top Type   216X138X41mm(WXDXH) Weight 1.25KG/PCS Application          75 ohm 4*E1 PDH   120 ohm 4*E1 PDH