Transceivers electrical and optical lanes diagram
100GBase-SR10 transceivers
The 100GBase-SR10 transceiver has 12 or 10 fibers to transmit and 12 or 10 fibers to receive. This transceiver uses 20 multi-mode fibers (10x10G TX-R pairs) with a 24 fiber MPO connector. For the 120Gb connection, it uses all 24 multi-mode fibers (12x10G TX-RX pairs).
![](mpo_cxp_transceiver_combo_02.png)
![](mpo_cxp_transceiver_diagram.png)
100GBase-SR4 QSFP28 transceivers and 40GBase-SR4 QSFP+ transceivers
The 100GBase-SR4 QSFP28 transceivers and 40GBase-SR4 QSFP+ transceivers have four fibers to transmit and four fibers to receive. These transceivers use eight multi-mode fibers (4 x 25G or 4 x 10G TX-RX pairs) with a 12F MPO connector.
![](qsfp28_qsfp+_mpo_xcvr_combo_02.png)
![](qsfp28_qsfp+_mpo_xcvr_diagram.png)
100GBase-LR4 QSFP28 transceivers and 40GBase-LR4 QSFP+ transceivers
The 100GBase-LR4 QSFP28 transceivers and 40GBase-LR4 QSFP+ transceivers use one fiber to transmit and one fiber to receive. These transceivers use two single-mode fibers (TX-RX pair) with an LC connector. It uses four lambdas (or wavelengths) on a pair of fibers, and does not lend itself to "splitting" into four pairs (4x25G or 4x10G).
![](qsfp28_qsfp+_lc_xcvr_combo_02.png)
![](qsfp28_qsfp+_lc_xcvr_diagram.png)
100GBase-SR2 BiDi QSFP28 transceivers and 40GBase-SR2 BiDi QSFP+ transceivers
The 100GBase-SR2 BiDi QSFP28 transceivers and 40GBase-SR2 BiDi QSFP+ transceivers have two fibers to both transmit and receive. These transceivers provide bidirectional connections on existing multi-mode fiber optic cable infrastructure with LC connector. Two different wavelengths are used to transmit and receive. Breakout to 4x25G or 4x10G is not supported.
![](qsfp+_lc_xcvr_combo_02.png)
![](qsfp+_lc_xcvr_diagram.png)
16GbFC SW transceivers, 10Gbase-SR transceivers, and 8GbFC SW transceivers
The 16GbFC SW transceivers, 10GBase-SR transceivers, and 8GbFC SW transceivers use one fiber to transmit and one fiber to receive. The transceivers use two multi-mode fibers (TX-RX pair) with LC connectors. The 16GbFC LW transceivers, 10GBase-LR/ER transceivers, and 8GbFC LW transceivers use two single-mode fibers (TX-RX pair) with LC connectors.
![](sfp28_sfp+_lc_xcvr_combo_02.png)
![](sfp28_sfp+_lc_xcvr_diagram.png)
10GBase-T SFP+ transceivers and 1000Base-T SFP transceivers
The 10GBase-T SFP+ transceivers and 1000Base-T SFP transceivers use one copper pair to transmit and one copper pair to receive. These transceivers convert an SFP+/SFP port to a 10GBase-T/1000Base-T RJ45 connection.
![](sfp+_sfp_rj45_xcvr_combo_02.png)
![](sfp+_sfp_rj45_xcvr_diagram.png)