ITU-T Q.120-1989
Definition and Function of Signals - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 5 pp

Standard No.

ITU-T Q.120-1989

Release Date

1989

Published By

International Telecommunication Union (ITU)

Status

Withdraw

Latest

ITU-T Q.120-1989

Scope

1.8.1 Note 1 - In general, the sequence of answer and clear-back signals that will be sent when the called

ITU-T Q.120-1989 history

• 1989 ITU-T Q.120-1989 Definition and Function of Signals - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 5 pp