That would be vdsl (correct me if I am wrong) and yes our lovely Telkom exchange do support 20/40 vdsl but you must be married to the exchange to get 20 meg vdsl because of data loss /signal to noise ratio blah blah blah read up on it on google and 40 meg is unavailable due to the Secunda mini-dsl not supporting.
Now moving to the real topic shown in this image is the pink area which is FTTH and is show to be under construction in secunda which is surprising as I have never heard about open serve .
Anyone care to inform us about this

maybe 123net is working with open serve? I have no idea.
Edit : Never mind I read up on it and its a Telkom partner meaning its TELKOM FTTH so this brought a smile to my face , at least I know when this 123net thing falls through the floor which it will Telkom will at least bring us some fibre if we can afford it . Big shrug at least Telkom is honest and upfront with their poor service.