Somebody misheard "radio button" at some point, and now is going around talking about "radial buttons". Press the button. Your phone rings and the line button flashes amber. Redial Press the Redial button to either dial the last number you dialed or display the redial list from which you can select a number to redial. The button decreases the scan contrast, and the button increases the scan contrast. These ITSP and IP PBX call controllers are a separate system in which the phone and the call controller communicate with each other to provide services such as call park and voicemail. Maybe I’m wrong, but I feel as if not many people know that the iPhone has a redial feature. on or off during ringing. Download All 5 icons from below and paste it into res -> drawable folder. 3. Remove a conference participant or an entry. As you can see in the picture there are 4 soft keys along the bottom edge of the LCD screen. Telephones with no buttons: Lift handset. Buy from our preferred vendors, including The Apple Store and MacMall. Place a call on Hold To put a call on hold: 1. I would be grateful, if someone can post a link to a sample where this works.