Im out in the wilds of Orkney (specifically, Sanday Island - KW17 2BW) and trying to do video streaming to "broadcast" an H.264 camera stream (via a content delivery network). understandably, the weak link in the signal path is the BT Consumer broadband uplink from the house to the wider internet. Ive clocked it using speedtestuk.net (and similar) at 300 Kbps. The download side varies between 2 - 3.5 Mbps.
Naturally I am interested in improving the uplink speed, to enable higher resolution etc.
How does A-DSL really work?
I thought that ADSL technology was developed specifically to enhance the difficult "local loop" wiring, that final stage of phone circuits that connect the subscriber to the service premises, often with very old copper wiring.
I further thought that one of the wizard wheezes of ADSL is to scavenge bandwidth from the uplink side in order to broaden the downlink side; which is "probably what most people want".
Am I right so far?
if I am right, then is there some sort of "optimising" algorithm that runs in the ADSL modems in order to decide what uplink speed to plump for?
I mean: if the modems are going all-out to get max downlink speed, the logical conclusion is that you will end up with zero uplink. However, that wont work due to the duplex nature of IP traffic. And they dont. you never find a link with less than about 300Kilobits of uplink.
is there then a lower limit of uplink speed that you can set a modem to negotiate for? if so is there an upper limit?
and, most importantly can you program an ADSL modem to increase the uplink speed at the expense of the downlink?
I fully realise that the first answer is "no, you cant", thats certainly what BT sales say. But, if you knew how to drive an ADSL modem properly, could you tweak it for more upload?