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I have ADSL via a Thomson TG585 v7 router (Demon Internet).

Generally these days its DSL connection reports something like

Bandwidth (Up/Down) [kbps/kbps]:  1.023 / 7.621

I'm interested in limiting the connection speed to a little slower: a year or so ago with the same router it used to connect at 4-6Mbit or so, and there was just less weirdness with e.g apt-get downloads suddenly slowing to a crawl or the router failing to establish an internet connection after restart without being prodded to retry via the web interface.

If I telnet into the box, the xdsl maxspeed command seems like it should let me inspect/control the maximum rate; but while (following a xdsl maxspeed tx=800000 rx=5000000, saveall and system reboot) I can get it to show:

XDSL Predefined Maximum speed: Upstream: 800000 Downstream: 5000000
XDSL Actual Maximum speed Upstream: 1023000 Downstream: 7736000

The predefined maximum speed seems not to actually have any effect on the connection established and the router's web interface also still reports the >7MBit/s DSL bandwidth. (Same even if I power cycle the router rather than soft-restarting it).

Any ideas if it's possible to limit the DSL speed on this router, and if so, how ?

NB I'm not just trying to limit bandwidth at the TCP/IP level. This is more to do with persuading the DSL connection negotiation to be more conservative about how much data it tries to cram down a noisy line.

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up vote 0 down vote accepted

Any need for this information went away after while, with the line quality apparently improving, or at least the router somehow figured out how to deal with it itself.

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