SM-20 is a GSM mobile communication system designed specifically for ships, featuring mobile phone communication, ship dynamic tracking, ship GPS function, large capacity short message storage, display and query.
The SM-20 is a marine‑grade GSM communication system that integrates voice calls, GPS tracking, and SMS handling for vessels. The manual describes the system’s components, including the SM‑20 transceiver, SM‑1010 handset, SM‑2080 display unit, and external GSM/GPS antennas, and outlines its main features such as dual‑SIM support, high‑gain antennas, and rugged construction.
Installation instructions cover mounting the transceiver, handset, display unit, and antennas, as well as wiring and power connections. Operational sections explain how to make and receive calls, configure ship position reports, and use the SMS display unit. Technical specifications and environmental requirements are listed for reference. This manual is written in Chinese.
| Operating bands | 900/1800/1900 MHz |
|---|---|
| Transmit power | 1‑2 W |
| Input voltage | 12 V DC nominal, 9‑30 V DC range |
| Dimensions | 186 × 182 × 36 mm |
| Weight | ≈0.5 kg |
| Antenna gain (SM‑1030) | 6 dBi |
| SMS storage capacity (SM‑2080) | ≥500 messages |
The SM-20 can accommodate two SIM cards, one for local calls and one for roaming.
The device is designed for a nominal 12 V DC input with an acceptable range of 9 V to 30 V DC.
The SM‑2080 can store at least 500 short messages.
Indoor components operate between –25 °C and +55 °C.