Why is my DSC PowerSeries PC1616 showing telephone line trouble?
- GGrant Reid Jr.Sep 2, 2025
If your DSC Control Panel is experiencing telephone line trouble, it could be due to low phone line voltage at the TIP and RING on the main panel (less than 3VDC). Measure the voltage across TIP and RING on the panel: it should be approximately 50VDC with no phone off-hook and approximately 5VDC with any phone off-hook. Try wiring the incoming line directly to TIP and RING. If the trouble clears, check the existing wiring or the RJ-31 phone jack.