Description

Yeastar GSM Module for S Series PBX Overview

The Yeastar GSM Module for S Series PBX is a compact cellular expansion module that adds one GSM voice channel to compatible Yeastar S-Series IP-PBX systems. It allows a business to connect a GSM mobile line directly to its PBX and route calls between the mobile network and internal IP phones. Yeastar identifies the GSM module as a 1-channel GSM module operating on the 850, 900, 1800 and 1900 MHz bands. 

The module is useful for organizations that want to integrate mobile communication into an existing PBX, reduce calling costs through mobile routing, or maintain an alternative communication route when other telephone services are unavailable. It is designed for internal installation and is configured through the compatible Yeastar PBX. 

Yeastar GSM Module for S Series PBX Price in Kenya

Yeastar GSM Module for S Series PBX Specifications

The module is officially part of Yeastar's modular PBX ecosystem. Yeastar states that S20 supports up to 1 GSM/3G/4G module, S50 up to 4, and S100 and S300 up to 6 GSM/3G/4G modules, subject to the specific cellular-module and PBX configuration. 

Yeastar GSM Module for S Series PBX Performance

• Provides a dedicated GSM channel for business voice communication.

• Enables a compatible S-Series PBX to use a mobile network as a telephone trunk.

• Supports both incoming and outgoing GSM calls.

• GSM connectivity can be used alongside SIP, PSTN and other available PBX trunks.

• LCR can help route calls through preferred GSM or other available communication paths.

• G.168 echo cancellation helps improve voice clarity.

• SMS functionality adds basic business messaging capabilities.

• Quad-band GSM support provides compatibility with supported GSM networks operating on the listed frequencies. 

Yeastar GSM Module for S Series PBX Design and Build

• Compact internal module measuring approximately 90 × 60 mm.

• Lightweight design of approximately 150 g.

• Designed for installation inside compatible Yeastar PBX hardware.

• Uses an SMA antenna connection.

• Receives power directly from the PBX backplane.

• Does not require a separate external power adapter.

• Designed for professional business telephony installations. 

Yeastar GSM Module for S Series PBX Connectivity and Compatibility

• Connects a compatible GSM SIM card to a Yeastar S-Series IP-PBX.

• Supports GSM frequencies of 850, 900, 1800 and 1900 MHz.

• Compatible with selected Yeastar S20, S50, S100 and S300 systems.

• Yeastar's current documentation identifies the GSM module as SIM800. 

• S20 supports up to 1 GSM/3G/4G module, while S50 supports up to 4 and S100 and S300 support up to 6, depending on the configuration. 

• Can provide GSM trunk connectivity alongside SIP and other telephone trunks.

• Compatibility should be confirmed against the exact PBX model, hardware version and available expansion slot before installation.

Yeastar GSM Module for S Series PBX Ideal Use Cases

• Small and medium-sized businesses requiring GSM connectivity.

• Office PBX systems that need an additional mobile trunk.

• Businesses using mobile networks for selected outgoing calls.

• PSTN or VoIP backup communication deployments.

• Branch offices requiring mobile connectivity through a central PBX.

• Call centres requiring additional GSM calling capacity.

• Businesses transitioning to VoIP while retaining mobile-network access.

• Cost-conscious organizations using LCR to optimize calling routes.

• SMS-enabled business communication through compatible Yeastar PBX functions.

• Organizations with limited fixed-line availability that need a GSM-based communication route.

Yeastar GSM Module for S Series PBX FAQs

How many GSM channels does the Yeastar GSM Module have?

The module provides 1 GSM channel, allowing one GSM voice call channel to be used through the compatible PBX. 

Which GSM frequencies does the module support?

It supports the quad-band GSM frequencies of 850, 900, 1800 and 1900 MHz. 

Does the module require a SIM card?

Yes. The module requires a compatible SIM card for connection to a GSM mobile network.

Which Yeastar PBXs support the GSM module?

Yeastar documents GSM/3G/4G module support across the S-Series, including the S20, S50, S100 and S300, with the maximum number of modules varying by model. 

Can the GSM module make and receive calls?

Yes. It can provide GSM trunk connectivity for incoming and outgoing calls through a compatible Yeastar PBX. 

Does the Yeastar GSM Module support SMS?

Yes. Compatible configurations support sending and receiving SMS through the PBX, including SMS-to-email and supported bulk-SMS functions. 

Does the module support Least Cost Routing?

Yes. LCR can be used to select preferred routes for outgoing calls. 

Is the Yeastar GSM Module a standalone gateway?

No. It is an internal expansion module intended for installation in compatible Yeastar PBX systems.

Yeastar GSM Module for S Series PBX Pros and Cons

Yeastar GSM Module for S Series PBX Conclusion

The Yeastar GSM Module for S Series PBX is a practical expansion solution for businesses that need to integrate a GSM mobile line with a compatible Yeastar S-Series IP-PBX. Its single GSM channel, quad-band support, incoming and outgoing call capability, SMS functions, echo cancellation and Least Cost Routing make it useful for mobile trunking, backup communication and hybrid business telephone deployments.