maybe something to do with this?
Telkom's International Circuits
>
> Hi All,
>
> While what follows is very difficult to confirm, it would seem that
> the trans-hybernia cable system current has a fault in it. As a
> result most of Telkom's international bandwidth seems to be routing
> via London.
>
> While in theory if Telkom has enough capacity in London this will not
> have a negative effect, there is a possibility that their European
> circuits could overload as a result, hence this is just a warning that
> there could be potential service degradation.
>
> TENET will attempt to confirm this with Telkom during the morning if
> the situation does not change, though due to reluctance on Telkom's
> side to disclose details of their international network this may also
> prove difficult.