GSM Module

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.