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DS1 Data

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A DS1 data line is a high speed 1.54 Mbps circuit which is comprised of 24 individual DS-O circuits. Each DS-O circuit has a speed of 64 Kbps. For perspective, your home telephone line is likely a DS-O line. DS1 data lines are also commonly referred to as T1 lines. DS1 data is carried through two twisted pairs of copper wires. (For more about DS1 data please click here)

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DS1 Data Definition Continued.

Almost all residences and businesses currently have two pairs of copper wires running to them. DS1 lines are capable of delivering 1.54 Mbps simultaneously in both directions, one direction for each pair of copper lines. Because DS1 data service is repeater driven (signal is digitally reestablished about every 6000 feet), it is available several miles from telephone central offices. For this reason, DS1 service can be available to virtually all businesses in the US. DS1 lines are dedicated, in that they are always connected, and are also extremely stable. Most reputable providers include service level agreements, which guarantee the reliability of the DS1 data lines they offer. DS1 circuits can transfer data in many forms to accomplish a variety of functions. These include: fractional DS1 (commonly 128 Kbps to 756 Kbps), burstable (less expensive for companies which normally do not need a full DS1/T1, but at times due to peak work loads, need a burst to full DS1 bandwidth), integrated (one DS1 line comprised of any combination the types of DS1/T1 listed here), channelized DS1 (another name for integrated T1), point-to-point (direct and constant DS1 connection between to locations), voice (telephone), dynamic integrated, pri (voice service which includes added features such as caller ID), and frame relay (a T1 network between two or more locations). Each of these types of DS1/T1 has advantages over the others, depending on the specific needs of your company. Also, the availability of each is based on the offerings of each DS1 provider and the geographic location. As the authorized agent for the top 20 telecom providers in the country, we now have the ability to provide you with online, unbiased, real-time availability and price quote comparisons. We also provide free consultation with no obligation to help you select the type of DS1, which would best meet your needs, and which provider provides this service at the best cost. Other than a desire to ensure that our customers receive the best possible service and customer care, we do not favor one provider over another. Our advice is completely impartial. You do not sign a contract with us; we assist you through the contract process to be signed directly with the provider. No middle man. Since three years ago, when we initiated the concept of all providers’ quotes being presented to the customer in one real-time, easy to read chart, the price average price of DS1 has dropped approximately $250. per month. This is not a coincidence! To price DS1 for your business, complete the pricing tool at the top of this page. It’s real-time, simple, free, 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.

Is PRI the Right Choice for Your Company?

Written by: Dennis Green - Jul 6, 2008

PRI (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 serves as a voice (telephone) channel. The D channel provides control and signaling information for the B channels. 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 T1s which are not PRI require 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 non-PRI 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 voice T1. These include: call by call service selection, more PBX users can be supported, caller ID, DID (direct inward dial) numbers, messaging, and video conferencing. Because of increased efficiency provided by PRI, companies which switch to PRI from traditional voice 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 most isolated rural areas. To assess availability and pricing for your location, use the tool at the top of this page or on our home page. This tool will provide real-time answers, it’s free, easy to use, and there is no obligation. (Click here to return to top of page)