Ohio River course forms the northern borders of West Virginia and Kentucky; and the southern borders of Ohio, Indiana and Illinois, until it joins the Mississippi River at the city of Cairo, Illinois. Where the Ohio joins the Mississippi is the lowest elevation in the state of Illinois, at . The Ohio River, which flows westward from Pittsburgh, Pennsylvania, to Cairo, Illinois, is the largest tributary, by volume, of the Mississippi River in the United States. At the confluence, the Ohio is considerably bigger than the Mississippi. Measured by long-term mean discharge in cubic feet per second and cubic meters per second,
Big River Telephone add full-featured residential and business telephony services to their existing customer base quickly and efficiently. Big River Telephone provides back-office platform support, network connectivity for voice traffic, support for operations and marketing and technical support. Currently Big River Telephone is providing back-office support and service to cable operations in Missouri, Illinois, Kentucky, Tennessee, Mississippi, Minnesota, Arkansas, Pennsylvania, Kansas, Texas, New Jersey, New Mexico, Oklahoma, Louisiana, Colorado, Nebraska, Indiana, and Georgia. Big River Telephone Company operates a network of class 4 and class 5 switches. To ensure reliability and security, Big River has implemented Class 5 VoIP switching technologies by MetaSwitch.