Electricity metering - Payment systems - Part 51: Standard transfer specification (STS) - Physical layer protocol for one-way numeric and magnetic card token carriers
This part of IEC 62055 specifies a physical layer protocol of the standard transfer
specification (STS) for transferring units of credit and other management information between
a point-of-sale (POS) system and an STS-compliant electricity payment meter.
It specifies
• encoding of token data onto token carriers in the physical layer protocol at the POS for
various TokenCarrierTypes such as numeric and magnetic cards;
• decoding of token data from token carriers in the physical layer protocol at the payment
meter for various TokenCarrierTypes such as numeric and magnetic cards.
It is intended for use by manufacturers of payment meters that have to accept tokens that
comply with the STS, and also by manufacturers of POS systems that have to produce STScompliant
tokens, and should be read in conjunction with IEC 62055-41.
NOTE 1 Although developed for payment systems for electricity, the standard also covers tokens used in other
utility services, such as water and gas.
NOTE 2 STS-compliant products are required to comply with selective parts of this International Standard only,
which should be the subject of the purchase contract (see Annex A).