A large company in need of a high speed internet connection is probably considering getting a T3 connection because they are fast and inexpensive.  There are several things to consider in regards to whether a T3 service is right for you.  There is your connection to think about, a T3 cost and a good T3 provider to find.  You also have to think about your current situation.  If you have a steady volume and are consistent, you may consider keeping services in house and going with a T3 connection. Whether you're considering a colo facility or a T3 to the door, make sure you use a broker to help guide you through the providers and plans available.

A T3 line would be installed as a major networking channel for a large corporation or university with high volume network traffic.  Now more commonly used and not near as expensive as it used to be, DS3 or Data Service Level 3 is the connection of choice for many large companies and places that require a lot of bandwidth. DS3 technology is used for T3 lines and allows connections to the Internet to reach speeds of up to 44.736 megabits per second.

A large company needs something more than a T1 line and could probably use a T-3 line powered by DS3 technology. When you need more capacity, you often have to buy it in the next available increment, which may end up costing more than you want or can afford to spend.
Keep in mind that with "bursty" application requirements, the need for additional bandwidth can often be as temporary as it is critical. By providing flexible capacity, or "bandwidth on demand," service providers can help customers deal with variations in traffic, and with avoiding a high fixed monthly payment. A T3 is high-speed line, powered by DS3 Technology , capable of delivering 44.7 Mbps  in both directions. For many years, the fastest, and unfortunately, the most expensive way to connect to the outside world was through a ds1 or T1 connection.

DS stands for Digital Signal or Digital Service. A T3 connection is a point-to-point dedicated line that provides 672 64-Kbps voice or data channels or in other words 28 T1 lines.

In addition, a T3 is used to transmit digital signals at 44.736 megabits per second and has enough bandwidth to transmit full-motion real-time video, and very large databases over a busy network. Although anybody can purchase a burstable T3, this type of connection can be costly, even as costly as a full 45Mbps connections. Burstable lines can be found at their lowest cost at a colocation facility. As a customer you will not have to pay for a the fixed cost of such a large pipe, but will have the benefit of being able to burst up to very high speeds if necessary. If you need the reliability of a large pipe fur busty traffic but don't have the capital consider a colo.  There are many things to consider before deciding on the right internet connection.