•       Meters Types according to prepayment method (Token entry):

•       Keypad Meters.

•       RFID Prepaid Meters (Contactless).

•       IC-Card Prepaid Meters (Contact).

       Usually keypad systems use STS (Standard Token Specification)

       STS is a standard for token transfer in a secure manner and applied for:

•       Magnetic Tokens (by Cards)

•       Numeric Tokens (through Keypad)