PostFinance PAX A35 User manual

Contents: Device overview
Delivery contents
Setup
Accepting payments
More settings
PAX A35
User manual
User manual for the basic functions
of the PAX A35 device

The PAX A35 is a cutting-edge, Android-based terminal offering numerous options and intuitive operation.
With its integrated reader for contactless payment methods, the card reader mechanism and the combination
of touchscreen and haptic PIN pad, the compact and robust device is the perfect choice for accepting modern
payment methods in your shop.
Note on power supply
For charging, please use the USB-A to USB-C cable supplied with the adapter and connect this to the commu-
nications cable as illustrated. This is the only way to charge the device.
Device overview
Connecting your terminal
Kensington®lock (1)
Display-integrated
reader area for contactless
payment methods (3)
Headphones connection (5)
Reader for magnetic strips (4)
Front camera (2)
Touchscreen (8)
Socket for
the stand (6)
Smart PIN pad (9)
with privacy shield
Cover panel and
communications port (7)
Reader forcards with a chip (10)
Communications cable [C]
Power cable [B]Power adapter [A]
RS232 USB-A LAN
USB-C
USB-A
PAX A35 (to 7)

1. Connecting the cables
Two cables are included in the delivery: a USB-A
to USB-C power cable [B] with adapter [A] and the
communications cable [C] for the terminal’s data
connection.
Please only connect the cables as illustrated on page 2.
Connect the power cable [B] to the USB-C port
on the communications cable [C]. Then connect the
USB-C plug on the communications cable [C] to
the communicationsport (7) on the rear side of your
PAX A35. To do this, remove the attached cover
panel. This can be reattached after connection – it
has a recess for the cable.
Then connect the communications cable [C] to your
Ethernet/LAN cable to integrate the terminal into
your network. Further data connections (e.g. to your
checkout system) can be used via USB-A or RS232.
2. Setting up Ethernet/LAN connection
As soon as your device is switched on, you must
set up your Ethernet/LAN connection before you can
enter the activation code (step 3).
– Select the menu icon in the upper left-hand
corner
– Choose “Device settings” and
enter your merchant password if applicable
– Select “Ethernet conguration”
– Select your network and congure
your individual settings if necessary
– As soon as you are connected, return to the
Start screen and continue with
the activation of your account (step 3).
3. Account activation
As soon as you have a LAN connection with your
network, you can activate your account. Return
to
the Start screen and enter the activation code you
received from PostFinance. You will nd the code
in the “Space” section of your Checkout back ofce
tool, under “Terminals”. The current conguration
may be loaded automatically onto the device. Please
do not interrupt this process until you see the Start
screen again. If you have questions about setup, our
Support team will be happy to help you.
The initial setup and installation of your new PAX A35 is very simple.
In just a few steps, your device will be ready to use for carrying out payment processes.
If you have questions during setup, our Support team will be happy to help you.
Delivery contents
Setup
Device
PAX A35
Communications cable [C]
RS232, USB-A, LAN / USB-C
Adapter [A] + power cable [B]
USB-A / USB-C
Perfect!
You have completed the initial setup of your
PAX A35 and can now start accepting modern
payment methods with your terminal.

Accepting a payment
To accept a payment and/or carry out a sale on your
device:
– Click on the card icon on the Start screen
– Enter the payment amount and conrm it
– If the tip function has been activated, you will see
a second entry window where you can enter and
conrm this (optional)
– Now the customer can present their card or
contactless payment method
– The transaction is carried out
Manual entry of payment data (optional)
Accept a new payment by clicking on the card icon
on the Start screen and entering the payment
amount. Then click on “Manual entry”. Your customer
then has the option to enter their card details one
after another (card number, CVV security code, validity
period). Finally, the total amount is shown again,
and this must be conrmed. (The functionality for
manual entry is optional and must be authorized
by PostFinance.)
Refunding a payment
To refund a payment to an available card on your
device:
– Click on the menu icon and enter your
merchant password
– Select the menu item “Credit” and enter the
merchant password
– Enter the entire repayment amount
– Now the customer can present their card or
contactless payment method where the refund
is to be made
Refunding via manual entry (optional)
Click on the menu icon , enter your merchant pass-
word, select the menu item “Credit” and conrm
again as required with your merchant password. Then
select “Manual entry”. You can then enter the
card details of the card where the refund is to be made
(card number, CVV security code, validity peri
od).
Finally, the total amount is shown again, and this must
be conrmed. (The functionality for manual entry
is optional and must be authorized by PostFinance.)
Many functions on your PAX A35 can be found intuitively via the modern touchscreen and are easy to operate.
Now you can nd the basic functions for payment processing directly via the terminal (stand-alone use).
When you integrate it into your checkout system, you receive usage instructions directly from the manufacturer.
Accepting payments

End-of-day settlement
All individual slips, reports and much more can be
accessed conveniently at any time in your account
in the Checkout back ofce. The end-of-day settle-
ment is created on your terminal:
– Select the menu icon
– Now choose “Reports” and then
“End-of-day settlement”
That day’s transactions are sent to the acquirer, and a
conrmation is shown on the display. The report can
then be viewed in the Checkout back ofce. Reports
should be compiled every day!
Cancelling the last transaction
The last transaction can be cancelled in a particularly
easy way. To do this, you need the payment method
used to make the payment:
– Select the menu icon
– In the menu, select “Cancel”
– Enter your merchant password
Payment reservation (pre-auth) 1
If required, you can pre-debit a payment method
and/or reserve the payment:
– Select the menu icon
– Now select the “Reservations” section and then
“Reservation”
– Enter the amount and present the card or contact-
less payment method (or optionally enter the card
details manually if they are available)
Adjust the payment reservation
(incremental auth) 1
To adjust an existing payment reservation:
– Select the menu icon
– Now select the “Reservations” section and then
“Increase reservation”
– Enter the amount by which you want to increase
the existing reservation
– Now enter the acquirer ID (Acq-ID) and
the relevant Transaction Reference Number
(Trx. Ref-No) and conrm these
Completing a payment reservation
(pre-auth compl.) 1
To complete an existing payment reservation:
– Select the menu icon
– Select the “Reservations” section and then
“Reservation entry”
– Now enter the acquirer ID (Acq-ID) and the
Transaction Reference Number (Trx. Ref-No) for
the original reservation and conrm it
Cancelling a payment reservation
(pre-auth cancellation) 1
To delete an existing payment reservation:
– Select the menu icon
– Now select the “Reservations” section and then
“Cancel reservation”
– Now enter the acquirer ID (Acq-ID) and
the relevant Transaction Reference Number
(Trx. Ref-No) and conrm these
1Note on the pre-auth functions
The functions for pre-auth / payment reservations
are available only for certain sectors, e.g. hotels,
and must be authorized by your acquirer.
For completing, adjusting or cancelling the pay-
ment reservation, you need the acquirer ID
(Acq-ID) and Transaction Reference Number (Trx.
Ref-No). Ensure that you make a note of these
numbers and/or keep the receipt for the reserva-
tion.

This document is intended for information purposes only. PAX and the PAX logo are brands or registered
trademarks of PAX Technology Limited in China and/or other countries. Other brands and brand names are
the property of the relevant companies. © 2023 PostFinance Ltd. All rights reserved.
Last updated September 2023. Subject to changes, and errors excepted.
Changing the merchant password
If required, you can change your merchant password
for the terminal directly via the terminal. As a general
rule, we recommend that you update the merchant
password via the Checkout back ofce. However, if
you wish to change the merchant password directly
via the terminal:
– Select the Settings icon
– Now select the “Change password” section and
enter your current merchant password
– Now enter a new password and conrm it by
pressing Enter / the green button
More settings
Integration into your checkout system
After integration into your network, your PAX A35
functions as a stand-alone, which means you can
manage all payment transaction functions directly
on
the terminal and use all Checkout back ofce
options.
If you want to use and control the terminal within
your checkout solution, please contact your checkout
manufacturer for further information and assistance
with this integration.
460.280.4 en 09.2023
We are available from 8a.m. to 12noon and from
1p.m. to 5p.m., Monday to Friday, to answer your
questions and enquiries.
Telephone: [phone] (max.CHF 0.08/min.
in Switzerland)
E-mail: checkout@postnance.ch
Any questions?