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Firmware problems (here's the workaround)...
on 5 May 2012
OK, this isn't a bad router, and it runs cool and has a Broadcom chipset which will most likely match the one in your local exchange DSLAM equipment.
So far so good, but now for the fly in the ointment.
It's advertised everywhere as having four Wireless SSID's. Zoom claim the unit will handle WPA2/WPA security protocol, see under the 802.11 section on the following page:-
You will find the only SSID which you can use WPA2/WPA on is the primary one.
The guest SSID's can be set with WPA2/WPA, but will refuse to work. Same with WEP. In fact the majority of the time they won't even work with no security in place. You can "see" them, but try as hard as you wish - you will be unable to connect.
Basically it's because the firmware it presently ships with is pants, although in due course they should release a better version to address the issue I'm highlighting.
In the interim here's a workaround.
Download the firmware file called 5790_firmware -v103.zip which you'll find here:-
This firmware is not available through the main support site.
Reflash the router with this firmware.
Once completed hold in the WPS/Reset button on the back panel for 10 seconds whilst the unit is powered on.
Power cycle the router off and on, and when it boots up go to [...] through an ethernet cable to one of the LAN ports, and enter the web style interface using "admin" and "zoomadsl" as the login and password.
Check it's been restored to factory settings (eg; your ISP login is gone etc).
Re-enter your ISP login details, and save the settings. Do NOT touch the Wireless settings.
Now go back in and set the primary WiFi SSID up, you can use WEP, WPA, or WPA2 AES-TKIP (the latter is the best security you can have as long as you choose a secure key).
Save the configuration.
Run the unit through yet another power on/off cycle.
Disconnect the ethernet cable and attempt to connect by WiFi to the primary SSID.
Make absolutely certain your WiFi card drivers are the latest for the device and that your system is patched and up to date.
You should now be able to get secure Wireless Access.
Now you can set up one, two, or three, guest SSID's, however please note that the only security setting you will find works is WEP, with either 64 or 128 level encryption.
Until better firmware is released this workaround will at least get you up and running with the guest channels - otherwise you can twiddle your thumbs are RMA it, or buy something else (not that there are many routers at this price which even offer iPv6 compatability or multiple SSID's anyway!)
Three stars out of five for versatility, and it would have had six stars if only the firmware did what it says on the tin.
Please add your comments if this saves your bacon, at least until the firmware's been rewritten properly :-)