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PRI T1

“When the top PRI T1 providers must compete for your business, you win!”

PRI T1 (Primary Rate Interface) is an ISDN connection designed to be provided over T1 lines. In the United States, a PRI line consists of 24 (64 kbps each) DS0 channels. PRI T1 lines are commonly configured so that 23 channels serve as B (Bearer) channels and one as a D (delta) channel. Each B channel carries data, voice, and other services. The D channel provides control and signaling information for the B channels. (For more about PRI T1 please click here)

What Our Customers Think About Us

Are we meeting our goal of becoming the number 1 place to shop for T1 lines in the world?See what our customers have to say about their experience with us:

"Selecting a provider was simple because the work was already done for us. We're saving more than we thought we could thanks to PRI-T1.info."

Todd Leishman
Director MIS
Allwest Plastics

"We found PRI-T1.info via a Web Search in Google while shopping for reliable/competitive T-1 lines. Adam Edwards, a PRI-T1.info consultant, asked me questions without selling anything and then delivered an array of options with pros and cons for each. I've dealt with many types of vendors as a "decision maker" for multiple companies and PRI-T1.info is a model for success. Needless to say we are in the process of converting all of our data lines throughout the country with the help of PRI-T1.info."

Todd Kawai
Controller
Sierra Engineering

"PRI-T1.info provided us with multiple options allowing us to compare quotes and select the best service for our needs. We were also pleased with the post-sales support PRI-T1.info gave us when we needed help getting our rebates and coordinating our provisioning."

Joju Sebastian

"The nature of our business demands a reliable T1 service. PRI-T1.info helped us find aTier 1 service provider and negotiated a lower price than the vendor would have given to us if we went direct.

Sunder Isaac
Registrar4less.com

"We found PRI-T1.info to be a very convenient and cost effective way to find new Voice and Data Service. Within 1-2 seconds there were quotes from 5-6 different providers. The PRI-T1.info folks were very helpful in explaining the pros and cons of the different services they were representing."

Tony Calisi
Advanced Technology

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PRI T1 Definition Continued.

B channels can be used as independent channels to simultaneously provide a variety of services such as internet, voice, or imaging. They also have the flexibility to be bonded, as needed, to provide higher bandwidth for special needs such as video conferencing. A significant difference between PRI T1 and traditional integrated T1 is that integrated T1 requires a portion of each channel to be allocated for signaling functions. This results in a reduction in effectiveness, efficiency, potential and bandwidth for most functions of each channel of traditional T1. With T1 PRI, all signaling functions are provided by the 24th channel. This leaves each of the other 23 channels with a full 64 kbps, which can be fully dedicated to bearer functions. One D channel can provide signaling functions for several other PRI lines. It is not uncommon for two D channels (one as primary, one for backup) to provide the signaling functions for a span of as many as 20 PRI T1 lines. This frees the 24th channel of each of the other PRI lines so that they can be used as additional bearer channels. Because PRI lines serve as a direct connection to the telephone company’s central office, PRI is often the preferred choice of PBX customers. PRI T1 provides many advantages over traditional T1. These include: dynamic channel allocation, call by call service selection, more PBX users can be supported, caller ID, messaging, and video conferencing. Because of increased efficiency provided by PRI, companies which switch to PRI from traditional T1 often find that they not only receive a much greater variety of services but often do not need to pay for as many trunks as they needed prior to the change. PRI T1 is available in most major metropolitan areas, but is not available in isolated rural areas. To assess availability and pricing for your location, use the tool at the top of this page. It will provide real-time answers, it’s free, easy to use, and there is no obligation. (Click here to return to top of page)

For details on any T1 related service, click on the service listed below.