Details：
Ordinary dialing function, handset mode; support for checking busy tone, automatic hang-up function; 3 groups of blank keys on the right side can pre-store numbers for one-touch speed dialing; compatible with various program-controlled switches, support switch's multicast function
Details：
Hands-free mode, ordinary phone use; RJ11 interface, built-in power adapter, AC220V power supply; when the called party rings, the loudspeaker will ring; support sound and light alarm, called state warning lights flashing, alarm ring work; support 4 groups Speed dial key, one-key dialing can be realized after hands-free; compatible with various digital or analog program-controlled switches, and IAD gateway equipment; support automatic detection of busy tone, automatic answering of the called ring
Details：
Hands-free mode, ordinary phone use; RJ11 interface, built-in power adapter, AC220V power supply; when the called party is ringing, the warning light flashes and rings; supports 4 groups of speed dial keys, and one-key dialing can be realized after pressing the hands-free key; Compatible with various digital or analog program-controlled switches, as well as IAD gateway devices; support automatic detection of busy tone, automatic hang-up, and automatic answering of the called ring
Details：
Hands-free mode, ordinary phone use; RJ11 interface, built-in power adapter, AC220V power supply; when the called party rings, the loudspeaker will ring; support 4 groups of speed dial keys, press the hands-free key to achieve one-key dialing; Compatible with various digital or analog program-controlled switches, as well as IAD gateway devices; support automatic detection of busy tone, automatic hang-up, and automatic answering of the called ring
Details：
Handset mode, ordinary telephone usage; RJ11 interface, built-in power adapter, AC220V power supply; when called, the loudspeaker will ring and the alarm light will flash; support 3 sets of speed dial keys, one-touch dialing can be achieved after the handset is lifted
Details：
Handset mode, ordinary telephone usage; RJ11 interface, built-in power adapter, AC220V power supply; when the call is ringing, the alarm light flashes; support 3 sets of speed dial keys, one-touch dialing can be achieved after the handset is lifted
