Also included are key telephone systems and most private branch exchanges.

For some users, the private branch exchange has gone full circle as a term.

For multi-line phone systems in general, see private branch exchange or key telephone system.

It has been integrated into the Asterisk private branch exchange system.

The telephone service in most establishments involves the use of a private branch exchange.

The end office, also called a branch exchange, is the closest connection to the end customer.

The switching center can also be used as an adjunct to a private branch exchange to provide in-building wireless services and call control.

Until today, customers looking for private branch exchanges had basically two Rolm options, the 8000 and 9000 series of switches.

A call placed behind a private branch exchange (PBX) has more options.

They help operate large phone systems known as private branch exchanges, or PBX's.

Other products included private branch exchanges.

The new products are likely to prove most useful to I.B.M. at the very high end of the private branch exchange market.

Businesses typically have a private branch exchange (PBX) within their offices.

Nortel Meridian is a private branch exchange.

Callpath works through corporate phone systems called private branch exchanges, or PBX's.

The BT Ambassador is a telephone private branch exchange switchboard.

More difficult to detect are break-ins to a company's phone system - called a private branch exchange, or PBX.

System administrators cover the third layer, looking at the characteristics of IT systems, including clients, servers and private branch exchanges or fax machines.

Business telephone systems are often broadly classified into "key systems", "hybrid systems", and "private branch exchanges".

It said problems might have cropped up when business customers did not adjust their own private branch exchanges, or PBX's.

This is called a privacy branch exchange (PBX).

Such networks operate a private switching system or a private branch exchange (PBX) within the network.

The products, intended for customers with 2 to 80 telephone lines, are known as key telephone systems and small private branch exchanges, or PBX's.

In search of easier targets, intruders have shifted their focus to office systems known as PBX's, which stands for private branch exchanges.

Large companies with PBX's, or private branch exchanges, which ease telephone calls between regional offices, will have to be reprogrammed.