I have a Partner R6 with PMVS R3. The customer is complaining of intermittent phantom rings where the phone justs rings on 1 of the 8 lines. You pick up the handset and nobody is there. They had an ASA card that I took out to try to narrow it down. The processor has been recently replaced. I have 8 lines and the phantom rings come on almost all of the lines.
TIA
TIA