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What is an Integrated T1?

Integrated T1 is a high speed digital service that combines telephone voice and Internet data on the same line.

Why order Integrated T1 service?

It can save you money. Every business has telephone lines and most businesses access the Internet or use a virtual private network (VPN). A common situation is an insurance office or medical center with 6 to 12 outgoing telephone lines connected to a PBX system for phone, and business DSL service for Internet Access. By combining all the phone lines and Internet service on a single T1 line, this business may well realize a monthly cost savings.

How do you combine telephone and the Internet?

It sounds like an odd mix. The plain old telephone service (POTS) is an analog voice service that’s been around for over a hundred years. The Internet is all digital. To access the Internet, most companies initially bought modems so that the phone lines could transmit both voice and data. Unfortunately, modems are limited to 56 Kbps or less of bandwidth due to the limited capability of normal phone service. But if you reverse the situation and convert the voice lines to digital, you can let one high speed data line carry phone calls and get as much Internet speed as you need.

The magic of converting phones to the digital format is usually done inside a PBX (private branch exchange) system that many offices already have. PBX lets you call within the office by dialing 4 numbers or less. Outside calls are connected to one or more phone lines. Some PBX systems already have T1 digital transmission capability built-in. Others will need to have an interface card added.

Data, such as Internet service, is already in the digital format and is distributed through a company network using devices such as hubs and switches. A router generally provides the interface between the Internet and the company network.

Combining Voice and Data

Now, here’s the combination magic. A T1 line transmits and receives a digital data stream that is made of up 64 K channels called DS0. T1 strings together 24 of these in a row along with some overhead and maintenance bits to create the T1 service called DS1. Each one of those DS0 channels can be setup to carry a telephone line or 64 K of “always on” Internet data. One T1 line can carry 12 outside phone lines plus 768 K of Internet data. Or, mix and match some other combination.
What does the merging? That’s a piece of equipment called an IAD or Integrated Access Device. It connects to the PBX and network router and assigns each of the 24 T1 channels to be voice or data. It then provides the access to and from the T1 line itself.


Integrated Voice & Data Convergence

Your VOICE calls are given priority, so you will always have phone lines open when you need them. But when you don’t, you will have more bandwidth available for your DATA needs.

Better than POTS, PRI Dynamic T1 provides small to medium businesses with a simple and affordable voice, Internet, and enhanced services solution. Others charge extra for what we’ll give you for free. With PRI Dynamic T1 you will get all the bells and whistles you need including: High Speed Internet, affordable Local and Long Distance phone service, a full featured Auto Attendant, Virtual Private Numbers for your employees, and all the key phone features you need (such as Call Waiting, Caller ID, Forwarding, etc.), Visual Voice Mail, Conferencing, Toll Free, and Automatic Call Routing for Disaster Recovery!

A PRI is also called a Primary Rate Interface line. It is somewhat different and more popular than a standard Voice T1 because it is true digital trunking, which allows for even more advanced calling features. A PRI line provides twenty-three telephone lines per T1, because the twenty-fourth channel is used to carry useful data for signaling and other features like special caller ID information called ANI is also known as a Automatic Number Identification. Since the transmission is digital, the quality of a telephone connection over a PRI line is unsurpassed, providing clear reception that is noticeable to the user.

The use of DID, or Digital Inward Dial numbers, and calling features like hunting and rolling, allow you to use twenty-three digital telephone lines to provide service to potentially thirty to forty employees, depending on how often they will need to use their phone. Instead of guessing on the number of DID’s to put on a PRI line, it is important to figure out the maximum number of simultaneous calls that could be placed at any given time. Having too few telephone lines causes costs more in a loss of productivity than it would cost to add more phone lines to keep your employees busy. This is why it is important to figure out the proper balance of telephone lines vs. DID numbers. The cost of a PRI is also typically lower than other forms of telephone service.

Voice and PRI T1 lines are common among businesses and call centers with multiple telephone lines and large call volumes. They are far less expensive and more efficient than installing dozens of POTS lines. Each of the 24 channels on a T1 line is versatile, allowing it to be used for either bandwidth or for a single telephone line. Therefore, a pure Voice T1 line will have 24 telephone lines with reliable service, good reception, good long distance rates, depending on the carrier, and a wide selection of calling features.

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