We have just moved into new premises and are using a Cisco 870 router to connect via BT Business Broadband (ADSL) to the Internet.
The line should be able to support up to a 4MB connection but when I run a speed test (e.g. using www.speedtest.bbmax.co.uk) I'm getting speeds down at the 150K mark! The PC running the speed test is connected directly and exclusively into the back of the router (so there are no other devices conflicting and the PC isn't going via a switch).
The router itself seems to think it has negotiated over 4MB of bandwidth: the result of "router#show dsl int atm 0" yields 5248 kbps.
As a test I set up a Netgear DG834 in place of the Cisco and that was completely happy to supply 3 ~ 4 MB as reported by the speed test site on the same PC connected in the same way.
So ... in my VERY inexperienced view I am fairly confident the BT line is OK but it seems that the Cisco is doing "something". Do you folks have any ideas what that "something" might be? Where do I start looking? What further information do you need to help diagnose this issue? Apologies if this is posted into the wrong forum, could you advise me where I should post it in that case?
My networking / router experience is limited (I'm "comfortable" with the complexity of the Netgear but the Cisco is just another level!) so bear with me if I don't understand any jargon in your answers.