IP550 Software Updates
Note this file must be called sp550.bin when loaded on the TFTP server of your PBX.
Firmware Current Release - 1.0.8.5 - 3/09/2011
md5: a75a8358197ee3c82dfc7aa6c98bfbe9
Release Notes [pdf]
Documentation
Using the IP550 (Powerpoint Presentation)
How to Factory Default an IP550