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 telephone usage; Optical fiber interface, DC12V power supply; When being called to ring, the loudspeaker rings and the alarm light flashes; Support speed dial function, 4 groups of one touch dialing; WEB page registration configuration, automatic response, hotline number, no disturbance and other methods; Compatible with various sip protocols IPPBX, supporting alarm broadcast video trigger linkage
Details：
Handset mode, ordinary telephone use mode; Optical fiber interface, DC12V power supply; When being called to ring, the loudspeaker rings and the alarm light flashes; Support speed dial function, three groups of one touch dialing; WEB page registration configuration, automatic response, hotline number, no disturbance and other methods; Compatible with various sip protocols IPPBX, supporting alarm broadcast video trigger linkage
Details：
Hands free mode, ordinary telephone usage; Optical fiber interface can support POE; POE or DC12V power supply; When the callee rings, the loudspeaker rings; Support speed dial function, 4 groups of one touch dialing; WEB page registration configuration, automatic response, hotline number, no disturbance and other methods; Compatible with various sip protocols IPPBX, supporting alarm broadcast video trigger linkage
Details：
Handset mode, ordinary telephone use mode; Optical fiber interface can support POE; POE or DC12V power supply; When the callee rings, the loudspeaker rings; Support speed dial function, three groups of one touch dialing; WEB page registration configuration, automatic response, hotline number, no disturbance and other methods; Compatible with various sip protocols IPPBX, supporting alarm broadcast video trigger linkage
Details：
Hands free mode, ordinary telephone usage; Optical fiber interface can support POE; Power supply mode: POE or DC12V; When being called to ring, the alarm light rings and flashes; Support speed dial function, 4 groups of one touch dialing; WEB page registration configuration, automatic response, hotline number, no disturbance and other methods; Compatible with various sip protocols IPPBX, supporting alarm broadcast video trigger linkage
