T1: A dedicated phone connection supporting data rates of 1.544Mbps can be configured for voice, data, voice and data traffic.

DS1: DS1 Digital Signals at 1.544Mbps on a T1 facility

DS3: DS3 Digital Signals transmitting at 44.736Mbps on a T3 facility.

OC3:  OC3 Optical Carrier 3 – A optical fiber line carrying 155Mbps.

Point to Point:  Point-to-Point Connection between two specific locations or stations.

Frame Relay:  A high speed packet switching network for WANs and LAN-to-LAN connections across vast distances.

DSL:  Digital Subscriber Line – Broadband for Home and Small Office.