I've got the following set up:
Pronto Network:
Room 1
Router (linksys 310N): 192.168.2.1
RFX9600:192.168.2.11 (connected to router via switch and ethernet cable)
TSU9800: 192.168.2.5 (connects via wireless)
Escient MX752: 192.168.2.6 (connected to router via switch and ethernet cable)
TIVO: 192.168.2.10 (connected to router via switch and ethernet cable)

Room 2
Access Point (Linksys160N) using DHCP connected to main router via ethernet cable.
TSU9600: 192.168.2.7 (wireless connection to network)
Escient MP150: 192.2.15 (connect to AP via eithernet)
RFX9400: 192.168.2.4 (connected to AP via ethernet cable)

It's been very unstable lately.

Mostly in Room 1, at apparently random times the TSU9800 will give a message that commands failed whether I'm trying to run my TIVO/TV or play music via my Escient with EscientPronto. When I look in the error log on the TSU9800 the message is that the extender failed to respond. Pretty much the most reliable way to correct this is to reboot my router.

Sometimes it also seems that if I use the TSU9600 in the Room 2 to control my Escient MP150 this will then screw up the TSU9800's ability to communicate with the RFX9600 in Room 1. Again the most reliable solution seems to be to reboot the main router.

These problems are happening with high frequency.

Any thoughts on what might be the cause? thx.

Try taking everything off of DHCP. I had the similar problem in a house and it was all fixed by using fixed Ip. Also, you may need to switch to a "g" router. For some reason this has made a difference in some instances.

Just set the router to B/G mode instead of B/G/N mode.
That also will help.

For the rest, i also use fixed ip adresses like Mattkoch says

..and make sure you're running the latest firmware on all the Pronto hardware.

The TSU9800 and RFX9600 only have one firmware version, so updating the their firmware is not an option. the tsu9600 firmware i would keep version 5.06

The main router is set for g only as this was the suggestion on the Philips web site. All software is up-to-date.

The access point in Room 2 is on DHCP. It's actually a router that I'm using as an AP. I'm not sure if I can set that as a fixed ip. I'll have to play around with it.

Other than that, however, all the regular devices on the network are fixed ip as I indicated in my first post. From time to time, however, I do plug a laptop into that pronto network and that is also DHCP. Since I use that laptop to plug into another sub net on my LAN as well as the pronto subnet it would be a bit more complicated to set it on fixed ip.

BTW I am also controlling a pre-pro and a video processor via RS232 ports on the RFX9600. I assumed that this would not have anything to do with the problem.

Now this has me thinking (dangerous). Could I set the access point to a fixed ip and then configure the TSU9600, which I use solely in the room with that access point, to look for that ip address only?

The way it is now is that I have the TSU9600 to get into the network via the main router's ip. I assume that when the 9600 is close to the AP it will switch to that signal rather than the signal from the main router which is several rooms away. In fact, as has been noted in this forum previously, the prontos do not switch easily from one AP to another. They stubbornly cling to the one to which they initially attached. I found that only if I boot up the TSU9600 in the room right where the AP is, it will pick up the stronger signal from the AP rather than going to the router signal.

So if I can set a separate ip for the AP and then configure the TSU9600 to look for that ip to connect to rather than the main router, do I have to set a different WPA key for that AP even though access to it will give access to the entire pronto subnet?

This might be another subject as I am not certain that this is causing the instability with the RFX9600.

Have you thought about a dedicated RFX9600 for each remote, especially if both remotes can be in use at the same time.

I'm not sure how that would make a difference in terms of stability.

In effect I already have a dedicated RFX9400 for the TSU9600 and a dedicated RFX9600 for the TSU9800. They are all on the same subnet and have to be because I stream music from my Escient server to the Escient client in the room with the RFX9400/TSU9600.

The only thing that the two systems share is the network and the Escient client/server set up.

The two extenders shouldn't matter. I have a house that share 2 extenders and we use all 6 remotes all over the house. All one system.

If you go on phillips site, there is a script you can download that resets the wifi connection. It may be useful in your setup. I use it when we move a remote from room to room and jump from one wap to another.

The following might help but I use no RFX devices so take it with a grain of salt.

1) I never ever have to reboot the house Router. I never ever have to restart a WAP. I occasionally have to reboot a Pronto, but I am pretty sure I have one nasty bug laying around just so that I can't say "bug free"

2) 4 Prontos, three in "Set A", one in "set B", Three WAP's. Two of the WAPS have the same SSID as the Prontos in Set A. One WAP (The Theater) has the same SSID as the Pronto in the theater. This constrains the Theater Pronto to use the the Theater WAP, while all other prontos "share" the other two WAP's

I do not know how this would affect an RFX situation, but if the RFX's are hard wired to the router and all on the same sub net, it should be fine. It nicely isolates the Prontos in my situation.

Barry,
If I understand correctly, if I want to isolate the router/WAP in Room 2, I should set it as a fixed ip, give it a different SSID than the main router in Room 1 and then configure the TSU9600 that I want to force to the WAP so that it looks for the SSID of the WAP. That way the TSU9600 will only connect to the WAP and will have a strong signal rather than sometimes connecting to the main router which is several rooms away.

All my devices, router, and WAP will still be on the same subnet but the router and the router/WAP will broadcast different SSIDs.

Correct?
thanks.

PS do you think that it makes a difference in terms of stability if the router/WAP has a fixed ip? I ask because I'm not entirely sure how to set a fixed ip on it since it is a router acting as a WAP. Do I go to the place in set up where you would normally put in the ip of your ISP and instead put in the ip of my main router?

Ok. I set my WAP to have a different SSID than my main router and then reconfigured the TSU9600 to look for that SSID. It works great. I can't, however, say if this has had any effect on the stability of my system. I didn't change to a fixed ip for the WAP since I'm not sure I can and if it's possible am not sure how to do it. Anyway, the two SSIDs is a great idea. Thanks for that!

I'm sure the RFX9600 has had at least one!?

The router is a router+WAP so it has an internal WAP. The router will have an IP address for its main side (in my case the external connection to the Internet) and one for its LAN side so things on the LAN can see it as the gateway. If this is a linksys device the LAN side is normally 192.168.1.1. The built in WAP may not have an explicit IP as the only thing that talks to it is the Router nd that can then be managed internally.

Think of the internal WAP not being "On the network" but in a symbiotic relationship with the Router. It does not need an IP address as would be the case of a WAP this is connected to the network explicitly.