ZyXEL Communications P-2602R-DxA Series - Manual (Page 148)

P-2602R/RL-DxA Series User’s Guide
148 Chapter 11 Phone Usage
11.5 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.