Left a messege, that the call is regarding the promised callback in the requested time slot, and confirmation if the customer has managed to check his equipment asper advised, and to give a call back to 0800800151 if the fault is still there after checking apps.Kicking to the queue PRFAC1 cust says, everythings working ok and wants to close the fault reported,closing the fault on customers request,automatically Queued to RRFAC3 performed line test, line testing ok, asked the customer to check apps. Guided about the procedure of unplugging all other equipments/extensions/skyTV/comp if any and then go to the line box, undo the two screws below central groove and slide off the bottom panel, and test the non working , as well as some working phone into the socket which is in the right hand side bottom corner (test socket) to know about the fault location,