Moneris Checkout API Invalid Response: Diagnostic Report... | terminalfaults.org

Technical Background:

The Moneris Checkout API relies on secure data transmission over a network. Invalid responses can stem from:
1. Intermittent network connectivity.
2. Signal attenuation affecting data integrity.
3. EMV module initialization failures.
4. Incorrect API request formatting or data payload issues.
5. Voltage fluctuations impacting device stability.

Symptoms:

Moneris Checkout API returns an 'Invalid Response' error during transaction processing.

Possible Causes:

Network connectivity issues (Wi-Fi or Ethernet) between the terminal and Moneris servers.
Damaged or improperly connected network cable causing packet loss.
EMV chip reader malfunction, leading to incomplete or corrupted transaction data.
Incorrect API configuration settings within the Moneris terminal software.
Power supply fluctuations resulting in unstable terminal operation.
Static discharge (ESD) damaging the network interface.

Solution:

1

Perform a network connectivity test on the Moneris terminal. Verify internet access.
2

Inspect the network cable for damage and ensure it is securely connected to both the terminal and the network switch/router.
3

Power cycle the Moneris terminal. Unplug the power adapter, wait 30 seconds, and plug it back in.
4

Verify the Moneris terminal's software is up to date. Check for and install any available updates.
5

Review the Moneris API configuration settings on the terminal. Confirm they match the documented requirements.
6

Attempt a test transaction with a known good test card. Observe the response.
7

If using Wi-Fi, check for signal interference from other devices. Try switching to a wired Ethernet connection for testing.

Safety Warning:

Safe Handling: Before inspecting any cables, safely unplug the Moneris terminal from the power outlet. Ensure your hands are dry. Avoid touching any exposed metallic parts on the terminal or power adapter.

Prevention:

Regularly inspect network cables for damage and ensure secure connections.,Implement a stable power supply with surge protection.,Clean the EMV chip reader slot with a specialized card reader cleaning card on a monthly basis.,Keep the terminal software updated to the latest version.,Avoid placing the terminal near sources of electromagnetic interference (EMI).,Use a humidifier during dry winter months to reduce static electricity (ESD).

Expert Tip:

Try pressing the 'Clear' button multiple times followed by the 'Enter' key before attempting a transaction. This sometimes clears cached errors or resets the EMV module. If available, review the terminal's transaction logs for specific error codes for more detailed troubleshooting information. Use a high-quality shielded Ethernet cable to minimize EMI.

Frequently Asked Questions

•Is the terminal's network connection DHCP or static IP?

Check the terminal's network configuration settings. Static IPs are less susceptible to DHCP server issues.

•What is the error code being returned by the API?

The error code provides a more specific indication of the problem. Consult Moneris documentation for the error code definition.

•When did the 'Invalid Response' errors start occurring?

Knowing when the issue began can help correlate it with network changes, software updates, or hardware modifications.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Is the terminal's network connection DHCP or static IP?

•What is the error code being returned by the API?

•When did the 'Invalid Response' errors start occurring?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: