connecting and running  payment terminals on POSBox in different countries is heavily underdocumented.

this is what i know:

to connect a payment terminal you need three things:
1.
hardware: POSBox  and payment terminal.
if POSBox has no free USBs port for the payment terminal you need serial connector cable. (this problem is not 100% clear).

2.
additional module on server:

 "On the main Odoo server, you should install the module pos_payment_terminal."

https://www.odoo.com/apps/modules/10.0/pos_payment_terminal/

this module talks to the POSBox that it shall communicate with payment terminal.

3.
additional module on POSBox:

On the POSBox you may install a module with the right protocol for your payment terminal IN YOUR COUNTRY!


"On the POSbox, you should install the module hw_x depending on the protocol implemented in your device."

for France, the Telium protocol seems to be running. you can use module hw_telium_payment_terminal :
https://www.odoo.com/apps/modules/8.0/hw_telium_payment_terminal/

(it is not sure whether that works on 9.0 or 10.0)

if you have other than Telium protocol (e.g. ZVT, OSI in germany) then you must ask for a module that supports that.

i have not found any other module than Telium.

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hint: call the biggest odoo gold partner in your country and ask them directly (and provide answer here).

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but it will be post paid card and prepaid cards and loyalty cards."i have no idea of working with that kind of cards..