FOSA GSM Gateways 850/900/1800/1900MHz Wireless to Wired Telephone Box, 24-Hour Work Can Connect The Phone Box Alarm Recorder to Make Calls with External Antenna (US Plug)

FOSA GSM Gateways 850/900/1800/1900MHz Wireless to Wired Telephone Box, 24-Hour Work Can Connect The Phone Box Alarm Recorder to Make Calls with External Antenna (US Plug)

• With 9 LED indicators, signal display, call status display. 24 hours of work, built-in watchdog automatic detection, all-round avoid the occurrence of crashes, to prevent crashes, to avoid missed missed calls.
• The new slot upgrade, easy to view the contact between the card and the chip, but also conducive to some customers with Cato, easy to insert and remove the phone card.
• With automatic step-down circuit, you can directly use the security alarm system 12V power supply.
• Standard DTMF input recognition and display. In addition to the standard caller ID, standard DTMF input can also be used to effectively avoid errors such as missing numbers.
• Using anti-noise circuit design, anti-noise and anti-jamming. Using industrial wireless communication module, with high-quality signal to enhance the antenna, the signal is relatively strong, clear and stable voice quality.