Depending on the card issuer, a payment card may incorporate Chip and/or Stripe and/or Contactless functionality. The card entry method at the POS (see below) determines which functionality is used and how the card interfaces with the terminal or attached PINpad.
To use Chip functionality:
When the SWIPE OR INSERT CARD (or SWIPE/INSERT/TAP CARD) prompt displays (terminal or PINpad), you or the customer insert the card into the chip reader.
To use Stripe functionality: 
When the SWIPE CARD (or SWIPE OR INSERT CARD or SWIPE/INSERT/TAP CARD) prompt displays (terminal or PINpad), swipe the card on the magnetic stripe reader.
To
use
Contactless
functionality : 
When the SWIPE/INSERT/TAP CARD prompt appears, the customer taps or waves their card over the terminal or external PINpad display screen.
To use Manual Card Entry:
If all available card entry methods fail, you may manually enter the card number (terminal only) for credit cards and some debit chip cards:
When SWIPE CARD or SWIPE OR INSERT CARD or SWIPE/INSERT/TAP
CARD displays, key in the card number
on the terminal, and press the
green 
key.
When prompted, enter the card's expiry date and press the
green key.
Then when ENTER MAN ENT PASSWORD prompt appears, key in the manual card entry password
and press the green
key.