Details：
Handset mode, ordinary telephone use mode; 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, 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