We have a combination of about 30 Fanvil X5U AND X6U phone sets. Yesterday all these phones were showing no firmware issues. This morning, when in the Phones screen, all 30 of these phone sets are displaying in the color red and noting that the firmware (2.12.15.6) is not supported.
- What causes a previous version of firm that was supported to become unsupported?
- Is only one version of firmware supported at any single time?
- When all devices "go red" because of firmware that was previously supported is no longer supported, should I upgrade firmware immediately (interrupt normal phone use operations) or upgrade at the earliest convenience?
- In the case noted above, am I always safe to use the 3CX function of selecting the devices and executing the "+Firmware" update?
