10G BiDirectional SFP+ optical modules transmit data over a single optical fibre (simplex)
10G CWDM SFP+ optical modules transmit data in the second and third transmission windows (1270-1610nm).
10G DWDM SFP+ optical transceivers are available in 100GHz and 50GHz versions. They enable transmission over a range of 1565.5nm to 1528.77nm.
10G Tunable SFP+ transceivers contain a tunable laser which can be adjusted to work in any channel of 50-GHz DWDM system in the range of 110 (1568.75nm) to 615 (1528.40nm).
10G SFP+ DAC (Direct Attach Cable) transceiver consists of two modules connected with a copper cable and provides an economical solution on a short distance which is mainly used in server rooms.
A copper transceiver is a device equipped with a RJ45 port which facilitates transmission over a copper cable.