Troubleshooting Telus Network Connectivity API 500... | terminalfaults.org

Technical Background:

API 500 errors typically signify an issue on the server-side processing the request. However, network connectivity problems can manifest as apparent server errors if requests fail to reach the server or responses are corrupted. LTE band congestion, poor Signal-to-Noise Ratio (SNR), and inadequate Reference Signal Received Power (RSRP) can lead to packet loss or timeouts, resulting in API 500 errors. Port Forwarding configuration (443, 8000) must be verified to ensure correct data flow.

Symptoms:

Intermittent or consistent API 500 errors reported by the UPark system when communicating over the Telus network. These errors indicate a server-side problem or failure to complete a request.

Possible Causes:

Weak LTE signal strength at the remote UPark location, resulting in dropped packets.
High network latency or jitter on the Telus network affecting API request timeouts.
Incorrect port forwarding configuration on the Telus router/firewall, blocking API traffic on ports 443 or 8000.
Interference from other devices operating on similar LTE bands, reducing SNR.
Telus network outage or maintenance affecting connectivity in the remote area.
Software or firmware defects on the UPark system's network interface card (NIC) or modem.

Solution:

1

Verify LTE signal strength (RSRP) and quality (SNR) at the UPark kiosk location using a Telus-approved network diagnostic tool or the router's built-in interface. RSRP should ideally be above -90dBm, and SNR above 20dB. Lower values indicate potential connectivity issues.
2

Check the Telus router/firewall configuration to ensure that ports 443 and 8000 are correctly forwarded to the UPark system's internal IP address.
3

Conduct ping and traceroute tests from the UPark system to the API server to identify potential network bottlenecks or routing problems.
4

Reboot the Telus router and the UPark system to clear any temporary network glitches or software errors.
5

Confirm that the Telus SIM card is properly inserted and activated.
6

Contact Telus technical support to report any suspected network outages or performance issues in the area. Provide specific location details for accurate troubleshooting.
7

Review the UPark system's logs for more specific error messages or patterns related to the API 500 errors.

Safety Warning:

Ensure the UPark kiosk is powered down safely by disconnecting it from the power source before performing any physical inspections or cable management. Avoid working in wet or damp conditions. Do not attempt to open or modify any Telus hardware; contact Telus support for assistance.

Prevention:

Regularly monitor LTE signal strength and SNR at the UPark location. Ensure the Telus router firmware is up-to-date. Inspect network cables for damage and ensure proper strain relief to prevent disconnections. Implement a network monitoring solution to proactively detect and alert on connectivity issues.

Expert Tip:

Use a spectrum analyzer app on a smartphone to identify potential sources of radio frequency interference near the UPark kiosk. Temporarily relocate the kiosk or install a directional antenna to improve signal reception if interference is detected. Examine the Telus router's logs for DHCP lease issues that could create addressing conflicts.

Frequently Asked Questions

•What is the typical RSRP and SNR observed at other UPark locations?

Benchmarking RSRP/SNR data can reveal location-specific network issues.

•Are there any known issues with the Telus network in the specific geographical area of the UPark deployment?

Telus support can provide information on regional outages or planned maintenance.

•Does the UPark system implement any retry logic or error handling for API 500 errors?

Improved error handling can mitigate the impact of intermittent network connectivity problems.

Troubleshooting Telus Network Connectivity API 500 Errors in UPark Systems

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical RSRP and SNR observed at other UPark locations?

•Are there any known issues with the Telus network in the specific geographical area of the UPark deployment?

•Does the UPark system implement any retry logic or error handling for API 500 errors?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: