Bidirectional Amplifier or Node Supporting Out-of-Band Signaling

An apparatus comprising:

• a first diplexer having a first diplexer first port, a first diplexer second port, and a first diplexer third port, the first diplexer comprising;
• a first diplexer band-stop filter that attenuates signals with frequencies between greater than and equal to a first frequency and less than and equal to a second frequency, the first diplexer band-stop filter being connected between the first diplexer first port and the first diplexer second port, and
• a first diplexer band-pass filter that passes signals with frequencies between greater than and equal to a third frequency and less than and equal to a fourth frequency, the first diplexer band-pass filter being connected between the first diplexer first port and the first diplexer third port;
• a second diplexer having a second diplexer first port, a second diplexer second port, and a second diplexer third port, the second diplexer comprising;
• a second diplexer band-stop filter that attenuates signals with frequencies between greater than and equal to the first frequency and less than and equal to the second frequency, the second diplexer band-stop filter being connected between the second diplexer first port and the second diplexer second port, and
• a second diplexer band-pass filter that passes signals with frequencies between greater than and equal to the third frequency and less than and equal to the fourth frequency, the second diplexer band-pass filter being connected between the second diplexer first port and the second diplexer third port;
• an upstream reverse amplifier that amplifies signals from the first diplexer second port to the second diplexer second port, the upstream reverse amplifier connected between the first diplexer second port and the second diplexer second port;
• and
• a downstream Out-of-Band (OOB) amplifier that amplifies signals from the second diplexer third port to the first diplexer third port, the downstream Out-of-Band (OOB) amplifier connected between the second diplexer third port and the first diplexer third port.