T1/DS1 broadband in Arizona uses two pairs of copper wire for transmission over telephone lines. An ordinary telephone line uses the DS0 transmission protocol, which carries 64 Kbit per second. A T1 line uses the DS1 protocol to combine the equivalent of 24 telephone lines for a total bandwidth of 1.536 Mbit per second.

T1 Internet providers in Arizona usually offer T1 lines to private customers in DS0 fractions. However, a small business will typically use a full T1 line to connect to the Internet and a larger business may use multiple T1 lines bundled together.

There are three primary factors to consider when you compare broadband services in Arizona:

1. Prices for T1 in Arizona vary in part according to your distance from the carrier’s Point of Presence. The further you are from the carrier’s POP, the more your T1/DS1 line will cost.

2. Major carriers usually own and operate their own networks, generally resulting in the best actual transmission speeds.

3. A channel bank is necessary to separate the DS1 data stream back into the 24 DS0 data packets. This device is relatively expensive to purchase or lease and represents a substantial investment for a small business.

Action Steps
The best contacts and resources to help you get it done

Locate Arizona T1 Internet providers that sell full T1 service

Use dedicated T1 in Arizona to provide high-speed Internet access for a group of employees. These services frequently include multiple static IP addresses and email addresses under your domain name.

I recommend: Comcast offers businesses connection speeds much faster than DSL with downloads up to 16 Mbps and uploads up to 2 Mbps. Speakeasy offers T1 service throughout the country. You can check for service availability on Speakeasy's website by providing your location information.

Find dedicated T1 Internet providers in Arizona that specializes in business packages

Get T1 access in Arizona from a provider that can meet your needs now and scale your requirements as your business grows.

I recommend: EarthLink offers a symmetrical T1 business line so you can upload as fast as you download and guarantees 99.99 percent uptime. Cogent Communications offers dedicated T1 and T3 service to its Tier 1 backbone for businesses in more than 100 markets.

Check out local packages from dedicated T1 Internet providers in Arizona

Local T1 carriers in Arizona connect your business to the carrier's POP. This connection is known as the local loop and represents a substantial component of a T1 line's cost.

I recommend: Extreme Internet is in Tempe and provides point-to-point T1 lines in fractional increments. Systems Solutions offers bonded T1 circuits and web hosting services to businesses in the Phoenix metropolitan area.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  T1 service providers in Arizona will almost always offer substantially faster access than a DSL line of the same rated speed. Providers of T1/DS1 broadband in Arizona rarely oversubscribe their services, meaning that these customers will have access to the full transmission rate of 1.544 Mbps. By contrast, the oversubscription rates for DSL lines routinely exceed 4:1.