At&t Information Systems Inc.

Robert A Carson

David F Jones

Francis M Fenton

Lee A Vallone

Mary S Petrick

John D Walker

The present administration arrangement disables any idle system apparatus which would be affected by the administration changes being made. In the station administration mode once the selected station is idle it is held in a forced idle state until administration is completed. During the system administration mode all idle stations are held in the forced idle state and all idle central office lines are placed in a forced busy state until system administration is completed. Station visual and audible signals indicate the administration status to system users. At the conclusion of administration, any forced idle stations and forced busy central office lines are returned to the normal state.

Communication system administration method and circuitry

In the disclosed call transfer method and circuitry, audibly distinguishable ringing signals at a station set enable an answering party to determine whether a received call is either the original call or a previously answered call. Line status LEDs at each station set give specific visual indications to trace the progress of a call transfer.

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Indianapolis, IN, United States of America

Robert A Carson