Figure 2 MPO connector

Optical parameters

NOTE:

Average transmit and receive power ranges are provided for transceiver modules in this guide.

Transmit power

Transmit power is the power at which the transmitter of a fiber transceiver module transmits optical signals, in dBm.

Receive power

Receive power is the power at which the receiver of a fiber transceiver module receives optical signals, in dBm.

Copper transceiver modules

Copper transceiver modules transmit signals over Category-5 unshielded twisted pair (UTP). UTP transmission cover shorter distances than fiber transmission and can be used in small-sized networks only.

The HP Comware-Based devices support the HP X120 1G SFP RJ45 T Transceiver (JD089B) copper transceiver modules.

Transmission distance

Through UTP cables, signals can be transmitted over a distance of 100 m (328.08 ft.) only. This is because signals attenuate during transmission through the UTP cables.

Attenuation refers to the dissipation of the power of a transmitted signal as it travels over a cable. Attenuation occurs because signal transmission suffers certain resistance from the cable, which weakens the signals as they travel over the cable. When signals are transmitted over a very long distance, signal strength decreases significantly, causing the signal-to-noise ratio to drop below the accepted level. This makes it impossible to distinguish between signals and noise, resulting in decision errors.

When signals are to be transmitted over a short distance, use copper transceiver modules only.

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