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. 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. A T3 line would be installed as a major networking channel for a large corporation or university with high volume network traffic.

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. Worse yet, with current, "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. True bandwidth-on-demand services should allow for a wide range in capacity.

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. At a colocation facility, or "colo", many users share a large OC3 or OC12 pipe. 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. 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 colocations facility or a T3 to the door, make sure you use a broker to help guide you through the providers and plans available.

If a full T1 isn't in your budget, you need to consider a fractional t1 line. Why not get all the advantages of T1 even if your not in a market for a full T1? For many people the biggest factor in their decision is reliability and if reliability is critical to the applications you run over your connection you should seriously consider replacing your DSL connection with a fractional T1. DSL is a quick and cost effective method of acquiring high speed bandwidth however it is not intended to support commercial applications or large numbers of users as are T1 connections.

One drawback to fractional T1 service is the price. Even though you won't have a full T1 you will be paying quite a bit more than you did for your DSL connection. This is due to the structure of T1 pricing. A T1 connections is established by providing a "loop" or wire from the users premesis to the CO where the service provider has equipment. Part of the cost of a T1 is the "loop charge" or the monthly rental fee for the wire that is rented from the local phone company. Once the connection reaches the CO it can access the carriers network and reach any destination. This loop is paid in full whether you use a fraction of the available bandwidth or the full 1.5Mbps and therefore your price for a 768Kbps fractional T1 connection will never be half the price of a 1.5mbps full T1 connection.

Although the price reduction is not what you might expect it to be, this may put a T1 in your budget and be a great way to get dedicated service into your building. Once you have fractional service upgrading to full service is easy. Fractional service typically comes in 256Kbps increments from 256Kbps all the way to a full T1 at 1.5Mbps. Find the service that's right for you, but if you are supporting critical services think reliability. Reliability becomes critical when customers or employees depend on your connection for immediate responses. If your customers use your connection to access your databases or your server or the internet then reliability of your connection is critical. If your employees depend on your connections because you host the e-mail server in house or host web servers or ASP type products, your connections is considered critical. A critical connection can be viewed much like a lifeline, without which your business would be negatively impacted.