THE SECOND HANDSET OF THE ABOVE-MENTIONED PHONE WILL ONLY ALLOW ME TO DIAL 4 DIGITS BEFORE IT EMITS A CONTUOUS INTERMITTENT BURR TYPE TONE AND I HAVE TO ABORT FURTHER DIALLING. I HAVE TRIED EVERYTHING I CAN THINK OF TO CORRECT THIS FAULT. THE FIRST HANDSET WORKS PERFECTLY. ANY IDEAS? I WOULD BE GRATEFUL FOR YOUR SUGGESTIONS. THANKS & KIND REGARDS....R. MYCOCK (MR)