... , Remove. 2. STN graphic display module LCD 3. Incoming call indicator 1. Using STN graphic display module LCD, 30 characters of ... . Direct key 1-21, using LED two-color ( red / green ) indicator light, can be set as outside port number, extension port ... to pick up the call. 3. Incoming call indicator: large incoming call indicator, even at a distance or a noisy environment you ...