E840-DTU (GPRS-03) industrial grade quad-band GSM/GPRS digital radio serial port devices and network servers to transmit data
[Transmission Type]：GPRS
[Power]：30~33dBm
[Size]： 84*82*25mm
[Interface]： RS485/RS232
[Weight]：136±5g
[Introduction]：E840-DTU (GPRS-03) is a product developed for serial port devices and network servers to transmit data through each other through the network. This product uses the standard AT command, which enables transparent transmission between devices and servers. The cloud platform built by Ebyte can realize the free networking mode.
| Value | Description |
|---|---|
| Support Band | Quad Band: GSM850, EGSM900, DCS1800, PCS1900 Module automatically searches for frequencies Band selection can be set by AT command Compliant with GSM Phase 2/2+ |
| GPRS connection characteristic | GPRS multi-slot class 12 (default) GPRS multi-slot class 1~12 (configurable) GPRS mobile station class B |
| GPRS data feature | GPRS data downstream transmission: up to 85.6kbps GPRS data upstream transmission: up to 85.6kbps Encoding format: CS-1, CS-2, CS-3 and CS-4 Support for PAP (Password Authentication Protocol) protocols commonly used for PPP connections Support is usually used for CHAP (Interrogation Handshake Authentication Protocol) protocol Embedded protocol: TCP/UDP/FTP/PPP/HTTP/NTP/MMS/SMTP/PING, etc. Support for unstructured supplementary data services (USSD) |
| Value | Description |
|---|---|
| Antenna | SMA |
| Data interface | RS485 / RS232 |
| Baud rate | 1200bps ~115200bps，default：115200bps |
| TX power | Class 4 (2W)： GSM850 and EGSM900 Class 1 (1W)： DCS1800 and PCS1900 |
| AT command format | Ebyte general AT command |
| 3GPP frequency | 1 Timeslot | 2 Timeslot | 4 Timeslot |
|---|---|---|---|
| CS-1 | 9.05kbps | 18.1kbps | 36.2kbps |
| CS-2 | 13.4kbps | 26.8kbps | 53.6kbps |
| CS-3 | 15.6kbps | 31.2kbps | 62.4kbps |
| CS-4 | 21.4kbps | 42.8kbps | 85.6kbps |