ITU-T Q.258-1988
3.2 Telephone Signals - Specifications of Signalling System No. 6 (Study Group XI) 8 pp

Standard No.

ITU-T Q.258-1988

Release Date

1988

Published By

International Telecommunication Union (ITU)

Status

Withdraw

Latest

ITU-T Q.258-1988

Scope

The signalling-system-control signals are not related to telephone signal information. They are necessary All signalling-system-control signals specified (see Recommendation 4.255) are transferred by means of acknowledgement signal unit

ITU-T Q.258-1988 history

• 1988 ITU-T Q.258-1988 3.2 Telephone Signals - Specifications of Signalling System No. 6 (Study Group XI) 8 pp