SIP hands-free keypad-to-terminal Yd-20s

The Model 20S emergency
telephone is compatible with the
program-controlled telephone
exchanges of many brands on the
market. It is specially designed for
such places as box elevators, clean
rooms of pharmaceutical factories,
and dust-free workshops, the
telephone has the features of one-
button automatic alarm, one-button
cyclic dialing and one-button
automatic intercom. It is the
necessary communication
equipment for elevator emergency
help, and also the convenient
communication equipment for clean
room intercom.
Material: 304 stainless steel wire drawing
Protection level; IP54
Dimensions: 220 x 140 x 46mm
Temperature: -20 -70 °C
Adapt to humidity: 75% or less SIP protocol; SIP 2.0 power supply; 220V AC/12V DC Poe power supply; 12V SIP line; Max 2-way Setup Interface; WEB
DNS SRV; RFC3263 firewall; VPN L2TP, DMZ
Installation; embedded
3. The telephone motherboard is developed by foreign single-chip microcomputer with the company’s own grinding chip. All components are used SMT SMT
process, with rich functions and high integration, and two dry node interfaces are reserved for one opening and one breaking, enhance the linkage with external
equipment;
4. The 12-bit matrix design is adopted for the key, and the key is made of high-quality zinc alloy. After stamping, polishing, electroplating, oiling (glue
dripping) and other processes, the key has the characteristics of dust prevention, corrosion resistance and oxidation resistance, the service life is more than
500,000 times
5. The overall protection level of the phone is IP54. If you need to install it in the open air, you need to install a rain cover
6. 2-step volume adjustment mode, can be adjusted as needed.