P-2602HWNLI User’s Guide
198 Chapter 12 Phone Usage
12.5 Auto Firmware Upgrade
During auto-provisioning, the ZyXEL Device checks to see if there is a newer firmware
version. If newer firmware is available, the ZyXEL Device plays a recording when you pick
up your phone’s handset.
Press *99# to upgrade the ZyXEL Device’s firmware.
Press #99# to not upgrade the ZyXEL Device’s firmware.
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