Arguably, this is the feature that makes a business phone system powerful. Ring-U automatically configures “soft” and physical key functionality on all Grandstream phones that support it (GRP2135, GRP2170, GXP2614, GXP2616) with a layout similar to the one in the picture.

Will park a call in a parking slot, so that it can be picked up by other phones (or the same one). While on a call, press Park. you will notice Slot 1 or Slot 2 turns red.. That call is parked in that slot. It can be answered from any other phone by pressing the red button. Any phone without keys can park a call by transfering it to extension 600, the system will read the slot number it is parked in.

Ring-U typically configures 2 slots to display, there are 9 available. Each slot is essentially a “line” that a call can be placed on hold for some other phone to pick up. Place a call into the slot by parking it (see above), pick up that call by pressing the slot button that is red/occupied. A phone without keys can pick up a call by dialing the slot number. Example: The receptionist yells “Steve is on 602”, using a phone without keys, simply dial 602 to pick up the call.

Following the standard park/slot functions, the system will have a list of extensions and display if that extension is available or in use. In the example, the Lab extension is red because a person is using that phone. On some phones, you can one button transfer an active call just by pressing the extension. On others you press the transfer button (typically an arrow pictoglyph) and then the extension to transfer to.

Some phones,