Yeastar GSM Module for S-Series PBX

Yeastar GSM Module for S-Series PBX adds cellular connectivity directly to Yeastar S-Series VoIP PBX systems. This plug-in module inserts one or more GSM channels into compatible S-Series appliances, converting SIM cards into native SIP trunks without external gateways. Small to medium businesses, remote offices, rural deployments, multi-site operations and organizations seeking mobile cost savings or backup trunks choose the Yeastar GSM Module for its seamless integration, reliable call quality and simplified management within the PBX interface.

Insert the module into your S-Series PBX to gain GSM trunks instantly. Register SIM cards as internal trunks. Route calls through mobile networks for lower costs or failover. Support inbound and outbound GSM communication. The module delivers professional cellular integration with full PBX feature access, making it ideal for businesses that need mobile connectivity embedded in their core telephony system.

Detailed Use Cases and Compatibility

Cost Optimization with Mobile Trunks

Businesses insert the GSM Module to route outbound calls via cheaper mobile SIMs. The S-Series PBX applies least cost routing rules automatically. Inbound GSM calls reach IP extensions, IVR or queues. This hybrid setup reduces PSTN or SIP trunk expenses for high-volume calling.

Backup and Disaster Recovery

Organizations equip the S-Series PBX with the GSM Module as a failover trunk. During internet outages or SIP provider failures, calls switch seamlessly to GSM lines. Inbound mobile calls maintain business continuity. The integrated module ensures faster failover than external gateways.

Remote Site and Rural Connectivity

Branches or locations without reliable fixed lines use the GSM Module for primary connectivity. SIM cards provide voice trunks over cellular networks. Remote extensions register to the central PBX. The solution supports mobile data for management access when needed.

Multi-SIM Load Balancing

With multiple GSM Modules or multi-channel variants, businesses distribute call load across SIMs. The PBX handles channel grouping, SIM balance monitoring and rotation. This maximizes uptime and capacity in high-call-volume environments.

Compatibility and Integration

The Yeastar GSM Module is designed specifically for Yeastar S-Series VoIP PBX (S20, S50, S100, S300 and compatible models). It supports quad-band GSM frequencies (850/900/1800/1900 MHz) and works with most global SIM operators. The module integrates natively—no external cabling or separate IP address required. Full management occurs within the S-Series web GUI, including trunk status, call routing, SIM balance query (USSD) and signal monitoring. Compatible with all S-Series features like Linkus UC, call recording and CRM integration.

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Technical Specifications

Module Variants

• Single-channel GSM Module
• Multi-channel options (depending on S-Series model capacity)
• Quad-band GSM: 850/900/1800/1900 MHz

Voice Processing

• HD voice support (G.722, Opus wideband)
• Echo cancellation
• Comfort noise generation
• Voice activity detection

Telephony Features

• Native SIP trunk integration
• Caller ID presentation/restriction
• DTMF detection and relay
• Call progress tone detection
• SIM balance query via USSD
• Flexible routing rules within S-Series PBX
• Failover and least cost routing

Network and Management

• Plug-in module (no external Ethernet required)
• Managed directly from S-Series web GUI
• Signal strength monitoring
• SIM lock and blacklist support
• Firmware updates via PBX interface

Physical Design

• Compact plug-in card form factor
• Hot-swappable in supported S-Series models
• Power supplied by PBX chassis
• Operating temperature: 0°C to 40°C
• Humidity: 10% to 90% non-condensing

System Requirements

Compatible Yeastar S-Series PBX (S20, S50, S100, S300 or later models with available module slot). Active GSM SIM card with voice service. Sufficient PBX capacity for additional channels.

SIP protocol standards maintained by IETF. HD voice codec specifications detailed by ITU-T. GSM module standards aligned with 3GPP specifications.

Warranty, Support and Product Reliability

Aiconic Computers backs the Yeastar GSM Module for S-Series PBX with a full 12-month manufacturer warranty covering defects in materials and workmanship. Our support team provides prompt assistance for module installation, SIM registration, trunk configuration, routing setup and signal optimization. We stock only genuine Yeastar products from authorized distributors. Enjoy secure purchasing, fast delivery and dedicated customer service focused on your complete satisfaction.

This integrated GSM module brings mobile connectivity directly into your Yeastar S-Series PBX with simplicity and power. Enhance your telephony flexibility and cost efficiency with the Yeastar GSM Module today.