But as systems upgrade their equipment, more are expected to offer the option.

It has about 4,200 customers and no plans to upgrade its equipment.

Most providers are waiting to upgrade and test their equipment.

That will mean upgrading equipment to give them the tools to get the job done.

Police departments use the cash to upgrade equipment and pay for training.

The auditorium has upgraded sound and light equipment over the past few years.

In 2008 the power station was closed due to the high cost of upgrading equipment.

Meanwhile, it can upgrade existing equipment, at far less cost.

The company has also vowed to spend millions to upgrade equipment.

For many people, changes in video technology provide the compelling reason to upgrade audio equipment.