A POS message of S0 on your CBA device means: Modem Error. We’ve outlined more details on what to do when you see this code below.

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Fix CBA POS Response Code S0

In this article, we’ll look at why you’re seeing the code S0 on your CBA terminal and the next steps you can take.

What is a Response Code S0?

This response code, S0, means that there is a modem error for the merchant CBA. It could be due to a problem with an external modem or if the terminal is set to use the internal modem but there is no phone line connected. To resolve this issue, the merchant should check the communication link on the base and wall plug. They should also make sure that all cables are properly connected.

What do I do?

When the POS operator sees the response code S0, which stands for modem error, they should take the following steps:

1. Check if there is an external modem connected to the terminal. If there is, ensure that it is functioning properly.
2. If the terminal is set to use the internal modem, make sure that a phone line is plugged in.
3. Check the communications link on the base of the terminal and the wall plug to ensure they are securely connected.
4. Verify that all cables are properly connected and not damaged.

By following these steps, the operator can troubleshoot and resolve any issues related to the modem error, allowing the POS system to function correctly.

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If you need more information on how to deal with a response code of S0 showing on your CBA terminal, we recommend that you speak to your CBA Bank Account Manager. If you’re looking for help with knowing what POS options are available, get in touch with one of our POS Experts.

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