Such digital switches are used for sending large amounts of data at the high speeds.

Now it takes about 50 workers to produce the new digital switches, but about $1.5 billion to develop one.

For the analog to digital switch in 2009, the station remained on its pre-transition channel number.

True, digital switches and fiberoptic cables have greatly expanded the total number of calls that can be placed at any one time.

In 2009 the equipment was removed and digital towers were added for the national digital switch.

In the mid-1980s, the 4A crossbar was replaced with a digital switch which took up part of a single floor and quadrupled calling capacity.

Needless to say, that is not a digital switch.

Britain started its digital switch in October 2007.

Within the next two years the company also will install digital switches that triple the number of calls handled on current frequencies, he said.

In digital switches, this is usually an arrangement of and gates.