Updating firmware wrt54g
If you concerned about compatibility, flip your router over, get the version numbers and check the matrix.Linksys released versions 1.0 through 4.0 (I have an unused 1.1 and a 2.0 I'm using) powered by Linux. Then, sadly, Linksys released version 5.0 powered by Vx Works and the hacking community was bummed.Just about two years ago Greg turned me on to alternate firmware for the ubiquitous Linksys WRT54G. You can pick these little guys up for a song but it's the thriving alternate firmware community that's so interesting.Linksys has the best listing of the different firmware projects available.See the Open WRT Table of Hardware for more information on which devices run Open WRT.
If 192.168.1.1 isn't the IP address that's configured for the router, it's less of an issue than if the default password isn't correct.The router doesn't need to be reset to find its IP address.Assuming the Linksys WRT54G has been working as your router, you probably have several devices that are connected to it.This has been verified with a Cisco 7940 running SIP 6.3 and with X-Lite.Updating to the latest firmware will fix the problem.
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The 3rd party replacement firmware listed below offer additional features and more elaborate Qo S.