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.