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Network: Robust Network and Security

A Better Network Means Better Business

The ALLOVER™ Network

Only AT&T has the ALLOVER Network—the largest digital wireless voice and data network in America. The ALLOVER Network covers more than 273 million people and is growing, creating a solid platform to deliver services and solutions.

Our network is built on the worldwide GSM™ standard—the most widely deployed network standard in the world with over 70%, or over 2 billion subscribers on this network worldwide. GSM provides:

• Economies of scale—wider range and lower cost of solutions and devices

• Global compatibility—more international roaming potential

AT&T boasts the most cell sites and the most spectrum of any wireless network, delivering quality and reliability that enterprises expect from wireless:

• Strongest spectrum position also means more bandwidth to support our growing subscriber base with quality and reliability; more bandwidth to roll our advanced data services such as BroadbandConnect to support the growing needs of our customers.

• Higher cell site density means better quality, stronger signal and more coverage.

We also continue to grow our customer base, creating the largest Mobile to Mobile calling community—more than 57 million subscribers. So AT&T's mobile to mobile calling has an even greater value. More of your co-workers, customers and business partners are now a free phone call away.

AT&T has the largest global presence of any US-based wireless provider. Customers with a compatible device can roam in more than 190 countries for voice and 130 countries for data. When you travel, your wireless phone, laptop or PDA can go with you. Half-way around the world, you're still doing business with AT&T.

BroadbandConnect

BroadbandConnect is AT&T's 3G network operating on GSM™, the worldwide standard for wide-area wireless communication. The first widely available service in the world to use HSDPA (High-Speed Downlink Packet Access), BroadbandConnect is the only 3G technology which natively supports simultaneous voice and data. BroadbandConnect provides:

• Average downlink data speeds of 400 to 700 kilobits per second-download a 4MB file in under a minute.

• More secure than Wi-Fi, utilizing SIM cards and encryption features to keep data transmissions safe.

• Low latency for improved performance.

• BroadbandConnect, along with our national EDGE network, provides the optimum combination of speed and coverage.

We're deploying BroadbandConnect in most major metropolitan areas in the U.S. In areas where BroadbandConnect is not yet available, stay connected with our EDGE network, covering more than 250 million people in over 13,000 cities and towns and along nearly 40,000 miles of highways.

Enhanced Security and Connectivity Options

Whether wireless or wired, network security is a primary concern for businesses. Today's increasingly sophisticated security threats make implementing superior wireless security even more of a necessity. Network-to-network connectivity provides performance, security and reliability necessary to enable wireless applications. AT&T provides you with a range of connectivity options and can assist in designing an end-to-end security solution.