-South Africa's fixed-line phone carrier Telkom has appointed Thami Msimango as Chief Technical Officer after a management shake-up, the company said on Thursday. Msimango replaces Reuben September, who was named Chief Operating Officer earlier this month when the appointment of new Chief Executive Officer Papi Molotsane was announced. The move comes after a management rejig sparked by the departure of former CEO Sizwe Nxasana, which media reports say has angered several Telkom executives. Telkom said in a statement Msimango has worked in the department of communications and then state-controlled Telkom since 1984 and has worked as head of network infrastructure provisioning since 2003. The appointment was effective September 6.