User Guide for the SIP-T46G IP Phone54when the call is muted.To un-mute a call:1. Press again to un-mute the call.Call Hold/ResumeYou can place an active call on hold. Only one active call can be in progress at any time. Othercalls can be made and received while placing the original call on hold. When you place a call onhold, your IP PBX may play music to the other party while waiting.To place a call on hold:1. Press or the Hold soft key during a call.The line key LED flashes green. The LCD screen indicates that the call is on hold.NoteTo resume a held call:1. Press or the Resume soft key.The phone will beep softly every 30 seconds to remind you that you still have a call on hold. Thephone i gnores enga ged a udi o de vice (ha ndset or headset) and switches t o Spea kerphone to playthe hold tone by default. The Speakerphone key will light up for 1 second.