CST indicates that tlf has faults dropped the call from a landline is takes the callis was guiding to the cst to make restore of settings of the phone and is has returned to fallnot have been possible to contact to the cst
CST suggests that the tlf presents faultsIt drops the call from a Fixed return callGuiding the CST was restored to make adjustments to the tlf and fell off againIt has not been possible to contact the TSA