ETSI EN 300 477
ETSI EN 300 477
Universal Personal Telecommunication (UPT); UPT phase 2; Functional specification of the interface of a UPT Integrated Circuit Card (ICC) and Card Accepting Devices (CAD); UPT card accepting Dual Tone Multiple Frequency (DTMF) device
standard published 05/01/1999 by European Telecommunications Standards Institute