ITU-T Q.140-1989
Definition and Function of Signals - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 3 pp

Standard No.

ITU-T Q.140-1989

Release Date

1989

Published By

International Telecommunication Union (ITU)

Status

Withdraw

Latest

ITU-T Q.140-1989

Scope

Note - The receipt of the busy-flash signal at the outgoing exchange will cause an appropriate indication to be given to the outgoing operator or to the calling subscriber; and the sending of the clear-forward by the outgoing exchange to release the inte

ITU-T Q.140-1989 history

• 1989 ITU-T Q.140-1989 Definition and Function of Signals - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 3 pp