Try manually assigning an IP address to your Mac. 192.168.1.10

Can't see where (under which heading/setting) to do that.

Here is the current position:

iMac is connected to wireless Tiger and has (according to system preferences) IP 192.168.0.137

In the Cisco settings, the router is listing 192.168.0.1 as it's IP, with a subnet mask of 255.255.255.0

The Billion box is set to Bridged (therefore PPoE is off) and DHCP is disabled.

In the settings on the new Cisco router, should Internet Connection Type be PPPoE, auto-DHCP, Bridge, or what?

At this stage, I cannot load any browser pages/ get email.

Thanks for sticking with me here.

Forgot this:

If I do try and load a web page, I get an ISP branded message that my login name is either incorrect, or expired???

I'm a little lost here. I thought you wanted to get in to the Billion box so you could turn DHCP back on?

If so, turn the new router complete off and disconnect it.

Go in to System Preferences > Network > Ethernet > Configure IPv4 Manually and then input an IP address for your Mac that is in the same subnet as the Billion box. You should then be able to connect to the Billion box through its web interface using its IP address. Did you change the IP address of the Billion box or just leave the default?

---- or ----

If you want to leave things as they are and work on the new router then the connection type should be PPPoE. Once you select that it will ask for the username and password assigned by your ISP.

That really should be all you need to do.

Thanks for that, you are quite right. Out of desperation, I called back 3BB and rechecked my logins. (pleasantly WHAT did I say?) The first rep had given me completely erroneous information.

It was just a case of turning off the DHCP on the Billion box, putting it into Bridge mode and then inputting the correct username and password on the Cisco box.

All up and running now. Many thanks for sticking with me through that walk in the dark.

Lunch on me if and when we catch up.

I'll be down tomorrow!

Just kidding. I'm off to the Similans for a dive trip next week. So close...

I'm glad you got it sorted.

Always welcome here any time!

I do need to get down south again one of these days....

KisMAC does not work in Lion. If you select Airport Extreme, passive mode, and scan all channels 1-11, and then start the scan, it will freeze after a while.

If You have the capability, then connect your devices to a switch (go wired instead of wifi) and see if that helps. It may not be a wifi issue

With 802.11g 2.4ghz band (in north america) , there are only 3 non overlapping channels (channels that can exist in the same area and not interfere with each other). These channels are 1, 6 & 11. Therefore, if there are other networks in your area using ch 1, switch to 6 or 11.

If all your devices are 802.11g devices, then disable 802.11b compatibility on your router, that will disable the protection mechanism in 802.11g that forces it to 802.11b speeds for backwards compatibility.

Dual band routers A & B/G (combined 2.4ghz & 5ghz bands) will not help if your devices (MBP or iPad or laptop) don't support 5ghz (802.11a). if they do, then switching to 802.11a (5ghz) will help you avoid noise on the 2.4 ghz band (microwave ovens, other wifi networks etc). Please note that there are some 5ghz cordless phones that may cause you problems on the 802.11a band.