| Model | M23 A |
| Product Feature | Tri-Band GSM/GPRS module : EGSM900/DCS1800/PCS1900 Compliant with GSM Phase 2+ standard Control via AT commands Supply Voltage range from 3.3v to 4.2v |
| Voice | HR/FR/EFR Noise deduction, echo cancellation Telephony Emergency Call Dual Tone Multi Frequency Function (DTMF) |
| Short Message Service (SMS) | Delivery Report Point to point MT/MO Cell Broadcast |
| GSM Circuit Switched Data | Asynchronous Transparent/ non-transparent Up to 14.4kbps |
| GPRS Packet Data | GPRS Class B GPRS Multi-slot Class 4 4 slot downlink (86.6kbps), 2 slot uplink (42.8kbps) max 5 slot Coding Schemes : CS1 to CS4 |
| Supplementary Services | Number identification Call forwarding (Call Divert) Call completion Multi Party Charging Call barring |
| Interface | Antenna Interfaces : RF connector support coaxial cable RF pads support RF cable soldering 44-pin B2B connector including : UART/RS232 SIM (1.8V/3V) General Purpose I/Os Analog audio input/output Power supply connection AT command set according to GSM 27.05, 27.07 |
| General Information | Dimension : 55.5 x 40 x 5.95 mm Weight : 15 g Operating Temperature : - 20 ~ + 60 °C Functional Temperature :- 20 ~ + 70 °C Storage Temperature : - 40 ~ +85 °C |
