GSM Module
The Yeastar GSM Module is an expansion module that adds cellular network connectivity to a Yeastar IP PBX. It provides a single GSM voice channel that lets the PBX make and receive calls over the GSM mobile network using a standard SIM card. This is especially useful in locations without fixed telephone lines or as a backup/PSTN failover option to reduce dependency on VoIP or fixed PSTN trunks.
Key Functions
- 1 GSM channel / trunk for voice call termination.
- Connects a standard SIM card for cellular network access.
- Enables PBX to route calls via GSM network (incoming and outgoing).
- Acts as a redundant/backup trunk when IP or PSTN service is unavailable.
Technical Specifications
- Number of GSM Channels: 1 channel.
- Network Type / Bands: Quad-band GSM – 850 / 900 / 1800 / 1900 MHz (global support).
- GSM Engine: Typically SIMCom based GSM radio.
- SIM Card: 1 × standard SIM (3V plug-in).
- Transmitter Power: Approx. +33 dBm (850/900 MHz), +30 dBm (1800/1900 MHz) typical.
- Voice Features: Caller ID, DTMF signaling support; may include SMS support depending on PBX firmware.
Compatibility
- Compatible with Yeastar S-Series and MyPBX and P-Series IP PBX platforms that support telephony modules.
Typical Use Cases
- Cellular trunking for businesses in remote areas lacking fixed lines.
- VoIP fallback / PSTN failover: Keeps voice service running during internet or fixed line outages.
- Cost Saving: Routes calls via mobile network to take advantage of competitive mobile tariffs.
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