Early dating

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Answering Service Many telephone subscribersmostly medical doctors--required 24-hour answering services.

The 755 crossbar PBXintroduced years earlier, in 1938was an excellent switch but could handle only up to 20 lines.The data was leaked thanks to ‘human error’, the publisher of the newspaper noted, and it wasn’t the fault of a Guardian employee, but rather a third-party technology provider.No more details were supplied about the source of the data spillage, but The Guardian confirmed that the problem no longer exists, as you would hope.In 1955, a specially designed answering service switchboard, called the 557, was developed.This switchboard had the same modular construction first used with the 555 and 556 switchboards introduced in 1948.

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