4G Cellular Modem with AT Command Control Support for Serial Interface
GS81
Key Features & Benefits
1. High-Speed 4G (LTE) Connectivity and Multi-Network Support
2. Industrial Interface Flexibility with Robust Protection
3. AT command control compliant with GSM 07.07 and GSM 07.05 standards
4. Support to RS232/RS485 Interface
5. Plug-and-play design with easy-to-use serial interface
6. Industrial Power Supply Flexibility and Efficiency
7. Durable Mechanical Design and Ease of Deployment
PRODUCT CATEGORIES
Introduction
The GS81 RS232/RS485 Cellular Modem is a compact and reliable communication device designed for industrial and remote monitoring applications. It enables sending, receiving, and reading SMS, and provides internet connectivity to dataloggers and controllers through a serial interface. The modem supports all standard SMS applications used by system integrators, making it ideal for critical alerting and communication in applications such as oil & gas, industrial automation, utilities, and other mission-critical environments.
Standards & Bands
GSM Compliance: Phase 2/2+
Control: AT commands (GSM 07.07 and 07.05)
Coding Scheme: CS1 to CS4
Supported Bands (India Only): LTE FDD: B1/B3/B5/B8, LTE TDD: B38/B39/B40/B41, WCDMA: B1/B8, TD-SCDMA: B34/B39, CDMA: BC0, GSM: 900/1800MHz
Control: AT commands (GSM 07.07 and 07.05)
Coding Scheme: CS1 to CS4
Supported Bands (India Only): LTE FDD: B1/B3/B5/B8, LTE TDD: B38/B39/B40/B41, WCDMA: B1/B8, TD-SCDMA: B34/B39, CDMA: BC0, GSM: 900/1800MHz
Performance
RF Output Power: < 35 dBm
RF Sensitivity: < -110 dBm
Data Rates: LTE FDD: Max. 150Mbps (DL) / 50Mbps (UL), LTE TDD: Max. 130Mbps (DL) / 35 Mbps (UL) , DC-HSDPA: Max. 42 Mbps (DL), HSUPA: Max. 5.76 Mbps (DL) , WCDMA: Max. 384 Kbps (DL/UL), TD-SCDMA: Max. 4.2 Mbps (DL) / 2.2 Mbps (UL), EVDO: Max. 3.1 Mbps (DL) / 1.8 Mbps (UL), 1x Advanced: Max. 307.2 Kbps (DL/UL), EDGE: Max. 296 Kbps (DL) / 236.8 Kbps (UL), GPRS: Max. 107Kbps (DL) / 85.6 Kbps (UL), CSD: Up to 14.4kbps
RF Sensitivity: < -110 dBm
Data Rates: LTE FDD: Max. 150Mbps (DL) / 50Mbps (UL), LTE TDD: Max. 130Mbps (DL) / 35 Mbps (UL) , DC-HSDPA: Max. 42 Mbps (DL), HSUPA: Max. 5.76 Mbps (DL) , WCDMA: Max. 384 Kbps (DL/UL), TD-SCDMA: Max. 4.2 Mbps (DL) / 2.2 Mbps (UL), EVDO: Max. 3.1 Mbps (DL) / 1.8 Mbps (UL), 1x Advanced: Max. 307.2 Kbps (DL/UL), EDGE: Max. 296 Kbps (DL) / 236.8 Kbps (UL), GPRS: Max. 107Kbps (DL) / 85.6 Kbps (UL), CSD: Up to 14.4kbps
Interface
Serial Ports: RS232 (DB9 Female connector) or RS485 (3 pin Screw type Terminal block)<
Port Protection: 15KV ESD protection
Voice: Tricodec, Half rate (HR), Full rate (FR), Enhanced Full rate (EFR), Hands-free operation
(Echo suppression), AMR Audio: Analog Audio Interface (Optional)
Port Protection: 15KV ESD protection
Voice: Tricodec, Half rate (HR), Full rate (FR), Enhanced Full rate (EFR), Hands-free operation
(Echo suppression), AMR Audio: Analog Audio Interface (Optional)
Indicator
LED Display: Network status, Power ON, Tx, Rx
Electrical
Power Supply: 24V DC (Range: 9 to 36V DC) via 3 pin screw terminal (3.81mm pitch)
Power Consumption: 0.8W @24V DC (Network registered, no communication), 1.6W @24V DC (During data/voice mode)
Power Consumption: 0.8W @24V DC (Network registered, no communication), 1.6W @24V DC (During data/voice mode)
Physical Characteristics
Enclosure: Metallic Enclosure with DIN rail mounting
Dimensions: 94 x 80 x 34 mm (enclosure only)
Antenna Connector: 50Ω SMA Female Connector
SIM Card Holder: Push Type, supports UIM/SIM 1.8V/3V
Dimensions: 94 x 80 x 34 mm (enclosure only)
Antenna Connector: 50Ω SMA Female Connector
SIM Card Holder: Push Type, supports UIM/SIM 1.8V/3V
Environmental
Operating Temperature: -20°C to 70°C
Storage Temperature: -40°C to 85°C
Relative Humidity: up to 95% Rh (non-condensing)
Compliance: Designed to meet various EMI/EMC standards
Storage Temperature: -40°C to 85°C
Relative Humidity: up to 95% Rh (non-condensing)
Compliance: Designed to meet various EMI/EMC standards
Collapse all
| Categories | DB9 | AC Power Supply | DC Power Supply | Download |
|---|---|---|---|---|
| GS81 232 | – | – | – | |
| GS81 485 | – | – | – |