Bonded T1 is an excellent option for companies which need more bandwidth than a single T1 (1.5 Mbps) circuit can provide, but are not yet ready for the jump to fractional or full T3 (45Mbps). With bonded T1, up to eight T1 circuits can be combined, to provide a circuit of 12 megabits per second (Mbps). A DS3 (also referred to as T3) circuit is the equivalent of 28 T1s. Bonded T1s allow incremental growth (the addition of one T1 at a time, as needed), more efficient budgeting (the jump from a T1 to a T3 increases monthly costs by thousands of dollars), the elimination of months of waiting while a T3 line is installed to your premises, and the thousands of dollars it would cost to install the special wiring or fiber that is needed for a T3 circuit if your building is not already “lit” (wired for DS3). Bonded T1 is provided through twisted pairs of copper wire (telephone lines). For this reason, bonded T1 is available to virtually any business in the US.