I still have this problem. I phoned Telkom over a week ago about this and still no resolution - not even a peep from a technician. Bought new POTS flters... did nothing. Removed all additional extensions... did nothing. Of course, I have to invest at least an hour to wait in the 0800 375 375 "support" line queue to get the standard "it has been assigned to a technician" response - and "he couldn't reach you on any of your numbers" (3 cellphone numbers provided).
Also, we have had ADSL line drops like mad for about a week (down about 25% of the time) - and the only thing Telkom will say about that is "get a new router". Funny, this particular router has worked flawlessly for a year. So I got a new Telkom router today, and, you guessed it. I think the truth is that Telkom's network is more susceptible to power cuts than they are admitting....
Yet again, I was going to hire a new South African employee for my business but the job just went to a new hire in our Spanish office. If people like me are making these decisions on a micro-level, I hate to think what investment opportunities the country is missing out on on the bigger scale. A BIG factor: ADSL for business use (unshaped) is barbarically expensive - 3 employees here consume a 4 GIG account each... costing more than R3000/month for something that in Spain and the UK costs R400/month and supports a workforce of 20 employees' usage + VOIP joining the offices (no usage cap, 5 times faster, instant support and 99.99% uptime).
Telkom + Eskom = 3rd world economy for a long time to come.
Oh... and have you read that HILARIOUS explanation of how Telkom are giving us extra bandwidth: GIGs vs GBs. You can find it on the adsl.telkomsa.net site, but don't look now as it is spitting out HTTP 500 errors.
I know it's not cool or PC to monopoly-bash because these parastatals are a "fact of SA life" and good money-spinners for the public coffers. But really, when will the policymakers get that developing countries need infrasctructure to develop? India, Brazil, and even Bangladesh get it...
;- rant over -;