"Access Key" Printed on Thomson Gateway Router

[#1]

Hi,
I've just had my BB activated today and everything went like a dream. I just have one question.
I noticed an 8-digit code on the router called an Access Key. It is NOT the WPA Security Key and it is NOT the Password to logon to the Router.
Maybe a clue is that my laptop seemed at ask for this code when I first tried to connect on wireless. However, it gave me another option to use the WPA Security key instead, so I used that...

Any ideas what this is?

[#2]

Is it all numbers? Maybe it's the WPS pin, but it would be more secure to disable WPS (WiFi Protected Setup) entirely.

[#3]

Mine's not all numbers but I thought it was probably the WPS pin

[#4]

Thanks for the replies!
It is 8-digits - upper case letters and numbers.
Maybe you are both right...

[#5]

Yes that'll be the WPS pin number.
I'd use WPA instead though.
Adam