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Model No. | MS121A |
| Power | |
| Power Input | 12VDC |
| Power Current | Max. 1.3A |
| GSM | |
| GSM Module | LISA-C200, CDMA 1xRTT |
| Band | Dual band 800/1900MHz |
| RX Sensitivity | -108 dBm |
| Down/Up Link | 154Kbps |
| Protocols | Embedded UDP/TP,TCP/IP and HTTP |
| AT Commands | Enhanced AT command set IS-707.3 3GPP 27.005,3GPP 27.007 and ITU-T V.25 3GPP 27.010 MUX protocol |
| Packet Data | Mode: Class B, Multislot10 Coding Schemes : CS1-CS4 Packet Channel: PBCCH/PCCCH |
| SMS Functionality | Text, PDU, MO/MT, Cell Broadcast |
| Approve version | Verizon |
| MCU | |
| MCU | ST Cortex M0 |
| Flash | 64K byte |
| SDRAM | 8K byte |
| Frequency | 48MHz |
| Interface | |
| RJ11 | DTMF Tone input |
| Mini-USB | RS232, Setting Parameter |
| DTMF Signal | |
| Input Signal Level | Max : 1 dBm Min : -29 dBm |
| Twist Accept Limit(Positive) | 10 dB |
| Twist Accept Limit(Negative) | 10 dB |
| Dial Tone Tolerance | 18 dB |
| Noise Tolerance | -12 dB |
| Third Tone Tolerance | -16 dB |
| Frequency Deviation Acceptance | Max ±1.5% |
| Frequency Deviation Rejection | Min ±3.5% |
| Power Up Time | 30ms |
| LEDs | |
| Power LED | Still On - Power on |
| Server Status LED | Blinking:Try Host Connection ; Still On:Host Connected |
| Internet Status LED | Off:Internet off ; Still On:Internet on |
| Signal Status LED | Off:No Signal ; Blinking:Weak Signal ; Still On:Strong Signal |
| Battery Discharge LED | Off:Batter Charging/No Battery ; Blinking:Battery Discharging |
| Battery Charging LED | Off:Battery Discharging/Battery Fully/No Battery ; Still On:Connected |
| Size | 118(L) × 63.5(W)x 20 mm(H) |
| Connector | RJ11, Mini-USB, DC Jack |
| Certification | UL864; FCC Part 15B |