What is T1 service?
T1 is a term for a digital carrier facility used to transmit DS-1 formatted digital signals at 1.544 Megabits per second. A T1 is made up of 24 digital channels or equivalent to 24 conventional telephone line using two pairs of wires. Most small Internet providers have a T1 line as their connection to the Internet. A full T1 should accommodate from one to over 200+ users and other services from an Internet service provider (ISP). The T1 was originated by AT&T in 1962 to send additional data along a common 2 pair of copper wire. The technology was originally to be used for “long-haul” voice communication, but in recent times has been used for data transmission. The T1’s digital signaling technology has grown into a variety of new themes, and applications. The European E1, the T3, Frame Relay, ISDN and many other technologies can trace their roots to the reliable T1.
What Is a T1 Circuit?
T1 is a high-speed data circuit with four wires, two of which are used for transmitting and the other two for receiving. The T1 is capable of transmitting and receiving data at a rate of about 1.5 million bits-per-second (BPS). T1’s data transmission rate is more than 50 times faster than a PC modem operating at 28,800 BPS. T1 circuits provide a bandwidth of 1.536 “usable” Mbps on 24 channels of 64 kbps each. This allows for the 8 kbps framing overhead. The aggregation of these channels can be subdivided as a “fractional” T1 of 64 kbps each. As the cost of T1 lines has reduced, the move seems to be to use the entire bandwidth rather than parceling the channels/lines out for different applications, or to different locations.
Is bandwidth guaranteed with a T1?
Yes, Unlike DSL or cable connections, a T1 is a physical circuit that’s dedicated to your exclusive use, and the full bandwidth of the T1 (or multiple T1s if you wish) is available to you at all times.
Why is a T1 used for voice communications?
The main advantage of T-1 is cost savings over equivalent service on regular analog lines. In general the cost of most 24 channel T1s is about the same as 12 standard telephone lines. This enables a business requiring 24 phone lines to do so for the cost of 12. Another advantage is that T-1 is a digital transmission and therefore less prone than regular phone lines to loss and interference.
Why is a T1 used for data communications?
Speed is the primary reason for data over T1. If a company transmits large files regularly outside their office an T1 can be a great asset as well as if they receive large amounts of Data. With the expansion of the internet and the requirement to send data at higher speeds, T1 technology has been essential for dedicated T-1 lines.
Can a T1 Be Used for both Voice and Data Communications?
Yes, with a piece of equipment called a multiplexer (which is similar to a channel bank), the T1 can be distributed into data circuits and voice channels. For example, a T-1 could be used to carry 12 telephone lines plus two data circuits at 386K baud. This would be an example of an integrated T1 circuit.
What is a Bonded T1?
A bonded T1 is when you have two T1 lines (from the same provider) which have been joined together in a special way so that you can use the combined total of 3.0 Mbps of Internet data or the 46 channels for voice/phone use. You cannot bond T1’s together if they are not through the same provider.
How Do Bonded T1’s Work?
Speakeasy bonded T1s use inverse multiplexing to utilize the full capacity of the 3Mb bonded circuit. Inverse multiplexing (IMUX) divides traffic from a single bit stream among multiple circuits. This means that traffic from a single source is distributed across the individual circuits to make use of the 3Mb of bandwidth.
What is a Fractional T1?
T1 is a term for a digital carrier facility used to transmit DS-1 formatted digital signals at 1.544 Megabits per second. A T1 is made up of 24 digital channels. Most small Internet providers have a T1 (or a fractional T1) line as their connection to the Internet. A full T1 should accommodate from one to over 200+ users and other services from an Internet service provider (ISP). For those whom a T1 is not necessary, fractional T1s are available at a lower cost. They simply use a fraction of the total channels available for a full high speed internet T1 line.
What is an Integrated T1?
A great new and popular service that allows you to combine all of your voice and internet requirements on one T1. Perfect for business with 5 + phone lines. These solutions start as low as $339 a month. This is the solution that the traditional phone companies don’t want you to know about.
What is T1 / T3 Point-to-Point?
Point to Point service provides you with the maximum amount of bandwidth around the clock for the most demanding Internet applications and access requirements. Point to Point service provides your business with a dedicated, 24 hour-a-day link to the Internet on the a Tier-One, national backbone. Starting from speeds of a fractional T1 through a full 45Mbps DS3 connection, Point to Point service will link your business directly from your network to your providers Point of Presence (POP).
What is T3?
T3 is a group of 21 T1’s combined together to form a circuit. This T3 circuit is capable of 44.736Mbps both upstream and downstream. Fractional T3s are available to those who need high speed internet downloads and uploads faster than a T1 but who do not need a full T3 line.
What is OC3?
OC3 are for carriers and large corporations requiring significant bandwidth. OC3 operates with SONET (Synchronous Optical NETwork). SONET was created to handle the gigabit/second data rate needed for the expansion of broadband and the Internet. As OC3 has such a high data rate, it is mainly used for large businesses with thousands of users or, more frequently for ISPs who need the bandwidth to handle all of its high speed internet requirements of their customers.