Caller is still on the line. Press Rls key to end to call. Place handset back in cradle. Call is in speaker phone mode. LCD indicator flashes.
Microphone is turned off while speaker is still on.
LCD indicator shows solid arrow. Both microphone and speaker are on. Number is dialed, or without lifting handset, press extension key twice. When you pick up the handset, your main extension is automatically activated, ready for you to make a call. The M2006 can have only one extension number.