Access to the Tswane network from anywhere inside the CSIR network is now possible. Read the wiki at
http://ict-intra.icomtek.csir.co.za/cgi-bin/kwiki/kwiki.cgi?MeshNetworks if you want to know how I did it. BTW, the wiki is hosted within CSIR Building 43c and is not accessible to those not on the same network. If you need access from outside, please contact me and we'll make a plan.