Different Types of T1 Lines

by Aeyne Schriber on December 22, 2009 in T1 Line

A T1 connection is used for transmitting data or voice over a high speed line that is faster than a DSL (Digital Subscriber Line).  Many companies and organizations opt to use a T1 connection due to its reliability, speed, and consistency for voice and data transmission.  There are different types of T1 lines that are designed to perform a variety of different transmissions for voice and data types.

Integrated T1

An Integrated T1 line makes it possible to transmit data and voice over the same line by assigning a specified number of channels for voice service while other channels are left for Internet bandwidth and data transmission.  With the two services integrated into one line Internet bandwidth does not suffer due to the fact that there are specific channels assigned for data transmission, while the remaining channels are reserved for voice transmission regardless if the service is being used or not.

Fractional T1

A Fractional T1 line is used for clients with smaller requirements such as a small business.  This type of connection provides a limited number of channels for data transmission.  The bandwidth is smaller on a Fraction T1 line since data transmission requirements are not as demanding as those of a large organization.  Regardless a Fraction T1 line still provides the same reliability, speed, and consistency that other types of T1 lines offer.

Private T1

A private T1 line provides a dedicated and secure connection from the access point to the end point or multi-points depending upon the design of the network.  It is used primarily for businesses that use more than one server for a Virtual Private Network (VPN) which allows workers to access data without going through a public network such as the Internet.

Voice T1

A Voice T1 is used by large companies that require a large amount of voice transmission through multiple phone lines.  A Voice T1 line is capable of handling unlimited phone numbers through a single line by compressing the bandwidth for each line that is connected to the Voice T1 service.  Many call centers and telemarketing agencies use this type of connection for voice transmission.

Dynamic T1

A Dynamic T1 line is an integrated connection for voice and data transmission however it favors voice transmission by immediately adjusting to the bandwidth to accommodate the type of phone conversation being transmitted.  For example, it will adjust the bandwidth needed for a conference call or a simple phone call between two parties.  When the phone line is not being used the bandwidth goes back to data transmission.

These are the five main types of T1 lines that are used for voice and data transmission.  There are also additional types that accommodate specific needs of companies and organizations and can be implemented on a variety of different network designs.

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