telephone connection speeds


Class Speed
T0 or DS0 56 Kbps or 64 Kbps
T1 1.5 Mbps
T3 45 Mbps

remainder are optical

OC1 52 Mbps
OC3 155 Mbps
OC12 622 Mbps
OC48 2.5 Gbps
OC192 10 Gbps
OC768 40 Gbps
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