Multi-fibre push-on (MPO) connectors like the superior MTP with either 8 or 12 fibres are commonly used in the data centre to either connect fibre panels in duplex applications or in end-to-end parallel optic applications like 40, 100, 200 and 400 Gbps that transmit and receive using 8 fibres (4 transmitting and 4 receiving at 25, 50 or 100 Gb/s).