1、LCD display, signal value display, call status display, etc. 2、The card slot is newly upgraded, which is convenient for viewing the contact between the card and the chip. It is also beneficial to some customers who use Cat 3、With automatic step‑down circuit, you can directly use the 12V power supply of the security alarm system 4、Standard DTMF input recognition and display. In addition to the standard caller ID, you can also use standard DTMF input to avoid problems such as missing numbers and other missing numbers 5、Adopt anti‑noise circuit design, anti‑noise and anti‑interference The wireless access fixed station is a wireless fixed voice and data access device adopting the GSM technology standard, and can quickly provide fixed wireless telephone communication services and data services by using the GSM network within the coverage of the GSM cellular network. It is suitable for fixed telephones that are not easy to be wired. It can directly replace fixed telephones and replace Internet data services. The product design is standard and open. Discover new business application areas for GSM network operators. This device provides a standard DTMF counterattack signal, which can accurately identify the call-on, and provide counter-signal billing for PBX switches, voice boards, and call centers. You can also pick up telephone landlines, alarms, recording boxes, and more. Features: 1. LCD display, signal value display, call status display, etc. 2. The card slot is newly upgraded, which is convenient for viewing the contact between the card and the chip. It is also beneficial to some customers who use Cato. 3. With automatic step-down circuit, you can directly use the 12V power supply of the security alarm system. 5. Adopt anti-noise circuit design, anti-noise and anti-interference 6. 24 hours of work, built-in watchdog automatic detection, all-round to avoid the occurrence of crashes, to prevent the crash, to avoid missed calls. 7. Adopt industrial wireless communication module, cooperate with high-quality signal to enhance the antenna, the signal is relatively strong, and the call quality is clear and stable. Typical application: 1. Establish a wireless public telephone system in the city, set up a fixed telephone booth, and carry out a public telephone service. 2. In public transportation, such as trains, buses, taxis, cruise ships and other transportation areas to carry out public business, to solve the travel needs of travelers. 3. It can be used together with the IC card wireless access fixed station/Intelligent network wireless access fixed station, coin-operated telephone, etc., to form an unattended public telephone system. 4. It is used as an emergency communication telephone next to the expressway to quickly report traffic accidents and quickly deal with traffic accidents. 5. It is used to solve the temporary communication needs of the public in rural areas, mountainous areas, islands, etc., where communication lines are difficult, temporary places, remote areas where wired telephones are not available, or uneconomical places. 6. As an emergency communication means in flood control command, mountain fire prevention, etc., quickly report the disaster situation and minimize the disaster situation. Specification: Color: White Working mode: GSM 900/1800MHz, can use 2G/3G/4G card, can connect multiple communication products Peak power: 0.25W/0.5W Power consumption: static ≤ 25mA, emission ≤ 300mA Sensitivity: -104 dB Ambient temperature: -10 °C ~ +40 °C Operating humidity: 45% to 90% (without condensation) Atmospheric pressure: 86~106 Pka Ambient noise: <60 dB Antenna connection: SMA antenna connector Skyline: glue stick antenna Antenna length: 280cm / 110.2in Antenna height: 20cm / 7.9in Telephone line length: 145cm / 57.1in Host size: 16 * 10 * 3.5cm / 6.3 * 3.9 * 1.4in Weight: approx. 431g Package list: 1 * Box Host 1 * Telephone Line 1 * Power Cord 1 * Antenna 1 * English Manual