Answer to: How do I turn Silent Mode ON to OFFWith the phone in standby, press and hold # on any handset. The phone prompts you to select the number of hours (1 - 9 or Always On) that you want it to stay in silent mode. To confirm press # or wait 5 seconds. Each handset will display silent mode. The phone will exit silent mode after the set number of hour or to exit manually press and hold # again.