CEPT T/CS 20-26 E-1981
Additional Signalling

Standard No.

CEPT T/CS 20-26 E-1981

Release Date

1981

Published By

CEPT - Conference Europeenne des Administrations des Postes et des Telecommunications

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CEPT T/CS 20-26 E-1981

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• 1981 CEPT T/CS 20-26 E-1981 Additional Signalling