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Internet Connection Types and Speeds Print E-mail
Connection Type Connection Speed Connection Medium
Dial-up Access Up to 56 Kbps Twisted pair (traditional phone lines)
ISDN 64 Kbps to 128 Kbps Twisted pair
ADSL/DSL 128 Kbps to 8 Mbps Twisted pair (used as a digital, broadband medium)
Cable 512 Kbps to 20 Mbps Coaxial cable 
Satellite 1 Mbps to 16 Mbps Satellite Dish
T1 1.544 Mbps Twisted-pair, coaxial cable, or optical fiber
T3 44.736 Mbps Optical fiber
OC-1 51.84 Mbps Optical fiber
OC-3 155.52 Mbps Optical fiber
OC-12 621.84 Mbps Optical fiber
OC-24 1.244 Gbps Optical fiber
OC-48 2.488 Gbps Optical fiber
OC-96 4.86 Gbps Optical fiber
OC-192 10 Gbps Optical fiber
OC-768 40 Gbps Optical fiber