According to this report in Fin24, it looks like Telkom is looking to bring down costs on ADSL services.

Johannesburg - Telkom announced on Monday that it filed for a cut in ADSL rental of up to 32% and an overall price cut of 2.1% with the independent telecommunications authority Icasa.

Africa's biggest telecoms company said in a statement that the main beneficiaries of its proposed price changes will be ADSL users who will enjoy a reduction in rentals of up to 32%.

There are also reductions of up to 20% in the monthly rental for residential ISDN services, a decrease of up to 39% in the rates for IPLCs (International Private Leased Circuits) as well as significant cuts in long distance and international call charges.

The price changes will take effect on August 1 2006 if they are approved by the Independent Communication Authority of South Africa.
How can ICASA say no.