ITU-T Q.136-1989
Loop Transmission Measurements - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 1 pp

Standard No.

ITU-T Q.136-1989

Release Date

1989

Published By

International Telecommunication Union (ITU)

Status

Withdraw

Latest

ITU-T Q.136-1989

Scope

Testing of the circuit and signalling equipment should include a check that the specifications of System No. 4 are met in regard to the following

ITU-T Q.136-1989 history

• 1989 ITU-T Q.136-1989 Loop Transmission Measurements - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 1 pp