Just a heads up to hopefully save someone the aggravation I've been through this past week.
About 10 days ago, I noticed slow to non existent speeds on my 4 meg line. Being quite far from the exchange and having had line issues before, i noticed the SNR had dropped to about 6 - 8. Strange though, their was not any obvious crackle on the line, as i have had before, when having line problems.
Well long story short, eventually telkom teckies changed me too a wholly new copper pair to the exchange today with a small improvement, but still snr in the 10 region, and speeds better but not great.
Tonight I noticed something else, previously I connected in line mode G.DMT (AKA ADSL1) but now obviously my exchange has been upgraded, because I am connecting in line mode ADSL2+. Luckily my D-Link gives the option , of which line modes to negotiate, I forced it to G.DMT and on resync my SNR is now 19, and speeds back to 4 meg.
A bit of research online bears out the fact that ADSL2+ allows higher speeds at short copper loop lengths, but degrades noise margin at longer loops.
I guess no 10 meg upgrade for me, but am happy to have my line back to what it used to be!!
About 10 days ago, I noticed slow to non existent speeds on my 4 meg line. Being quite far from the exchange and having had line issues before, i noticed the SNR had dropped to about 6 - 8. Strange though, their was not any obvious crackle on the line, as i have had before, when having line problems.
Well long story short, eventually telkom teckies changed me too a wholly new copper pair to the exchange today with a small improvement, but still snr in the 10 region, and speeds better but not great.
Tonight I noticed something else, previously I connected in line mode G.DMT (AKA ADSL1) but now obviously my exchange has been upgraded, because I am connecting in line mode ADSL2+. Luckily my D-Link gives the option , of which line modes to negotiate, I forced it to G.DMT and on resync my SNR is now 19, and speeds back to 4 meg.
A bit of research online bears out the fact that ADSL2+ allows higher speeds at short copper loop lengths, but degrades noise margin at longer loops.
I guess no 10 meg upgrade for me, but am happy to have my line back to what it used to be!!
