... , which can display the date, time, extension number, time of call, call information, calling state, the programmed state. 2. Direct key 1 ... . Incoming call indicator: large incoming call indicator, even at a distance or a noisy environment you can also know which phone is ringing ... , you can check the calls, as much as 50 groups caller ID can be stored. 5. Transfer key function ( TRFR ): you can ...