The OHA active optical hub replaces the optical node when rebuilding a classical HFC system to FTTB. This device allows upstream wavelength multiplexing in case of single fiber bidirectional networks. Thanks to the ability of handling even 4 DWDM downstream channels and 4 CWDM upstream channels on a single fiber, the solution fits to the networks serving large areas with limited fiber availability. The built-in EDFA and the user defined configuration between 1x2 and 4x4 makes possible to change 32 to 64 house amplifiers to nodes with different segment sizes.

• For FTTB networks with up to 64 nodes/segment
• Element of CWDM and DWDM networks
• Optional connection to monitoring system
• Indoor and outdoor versions are available

TECHNICAL SPECIFICATIONS___________________________________________________________
Forward path parameters OHA-1x OHA-2x OHA-4x
Number of input DWDM channels 1 2 4
Handled DWDM channels ITU 22, 24, 26, 28 *
Input optical power range [dBm] -3...10
Output optical power per DWDM channel [dBm] >5
Noise figure [dB] 4
Pump power leakage [dB] <-30
Output and input isolation [dB] >30
Reverse path parameters OHA-x1 OHA-x2 OHA-x4
Number of optical inputs 1 2 4
Input wavelength range [nm] 1270...1610
Input optical power range [dBm] -10...3
Equivalent input noise current [pA/√Hz] 4
Output optical wavelength [nm] 1470, 1510, 1590, 1610 *
Output optical power [mW] 4 (6 dBm)
Relative intensity noise (RIN) [dB/Hz] <-145
Frequency range [MHz] 5...204

General parameters OHA-L OHA-R
Optical connector LC/APC
Power supply voltage [VAC] 230±20% 30...65, 35...90
Maximum power consumption (full configuration - OHA-24) [W] 13
Screening factor [dB] 80
Degree of protection IP54 (only the die-cast housing!)
Temperature range [°C] -20...+55
Dimensions (die-cast / rack mounted) [mm] 252x215x120 / 483x240x87
Weight (die-cast / rack-mounted) [kg] 2.7 / 5.3