/FW_5.1.51/IPS150.zip	Version 5.1 release 51 firmware for older IPS-150 models

/FW_6.1.08/6108.zip     Version 6.1 release 08 firmware for IPS-150

/FW_6.5.21/6521.zip     Version 6.5 release 21 firmware for IPS-150

/FW_6.5.25/6525.zip     Version 6.5 release 25 firmawre for IPS 150
			-Fixes problem with Windows 2000 RRAS and NT4 RRAS

/FW_6.5.26/6526.zip     Version 6.5 release 26 firmawre for IPS 150
			-Adds hidden web page for MTU size adjustment
			-ie http://192.168.0.1/mtu.htm

/FW_6.5.27/6527.zip	Version 6.5 release 27 firmware for IPS-150
			-For use with Telstra Bigpond Email Services
			-Hidden web page for MTU size adjustment
			       ie http://192.168.0.1/mtu.htm

/FW_6.5.28/6528.zip	Version 6.5 release 28 firmware for IPS-150
			-Fixes Zero (0) Timer setting ignored 
			IPS redials after inactivity of 20 minutes

/FW_6.5.2c_beta/652c.zip	Version 6.5 release 2c firmware for IPS-150
			-Adds support for 255 in Ip address range


Zip files usualy contain two firmware files for two hardware revisions.
The Upgrade program will inform you of the correct one to use.

note: 

-If you need to downgrade to an earlier version of firmware you will need to use Upgrade Utility version 2.02.
 This file can be located in the previous folder.