Yeastar TG100 GSM VoIP Gateway for Small Business

The Yeastar TG100 is a single-port GSM VoIP gateway that connects cellular networks with IP phone systems. This compact device enables small businesses to integrate one GSM line into their existing PBX infrastructure for mobile connectivity. It serves organizations seeking cost-effective mobile integration, backup telephony options, or basic cellular-to-VoIP bridging without multi-channel requirements.

Technical Specifications

GSM Network Capabilities

• Frequency Bands: Quad-band GSM 850/900/1800/1900MHz
• SIM Support: 1 standard SIM card slot
• Voice Channels: 1 concurrent call capacity
• Network Selection: Automatic or manual carrier selection

Voice Quality Features

• Audio Codecs: G.711A/U, G.722, G.726, G.729A, GSM
• Echo Cancellation: ITU-T G.168 compliant
• Noise Reduction: Built-in background noise suppression
• DTMF Support: RFC2833, SIP INFO, In-band detection
• Jitter Buffer: Adaptive buffering for network variations

Network Interface

• Ethernet Port: 1x 10/100Mbps RJ45 connection
• Protocol: SIP v2.0 (RFC3261)
• Transport: UDP/TCP support
• Network Modes: Static IP, DHCP client
• NAT Traversal: STUN support for firewall compatibility

System Administration

• Configuration: Web-based graphical interface
• Security: SIP MD5 authentication, IP access control
• Call Features: Caller ID passthrough, call waiting, call forwarding
• Diagnostics: Real-time call logs and network status monitoring
• Firmware Updates: Remote upgrade via web interface

Physical Design

• Dimensions: 105mm × 85mm × 25mm (4.1″ × 3.3″ × 1.0″)
• Weight: 150g (5.3 oz)
• Power Supply: 5V DC, 1A (adapter included)
• Antenna: External SMA connector with included GSM antenna
• Operating Temperature: 0°C to 40°C (32°F to 104°F)
• Storage Temperature: -20°C to 65°C (-4°F to 149°F)
• Humidity: 10% to 90% non-condensing

Use Cases and Applications

Small Office Backup Connectivity

The TG100 provides essential communication redundancy for businesses that cannot afford downtime. When primary internet or landline services fail, the gateway automatically routes calls through the GSM network. Professional service firms, medical offices, and home-based businesses maintain client accessibility even during infrastructure outages.

Mobile Number Integration

Businesses can integrate their existing mobile phone numbers into desk phone systems without porting numbers to landline services. A company maintaining a well-known mobile contact number can receive those calls through their office PBX, enabling features like voicemail-to-email, call recording, and automated attendants that standard mobile service doesn’t provide.

Remote Location Telephony

Organizations operating from locations without reliable landline access benefit from GSM-based phone service. Field offices, retail kiosks, outdoor facilities, and temporary workspaces can establish professional phone systems using cellular connectivity as the primary link. The Yeastar TG100 transforms mobile service into full-featured business telephony.

Cost Optimization for Specific Routes

Businesses making frequent calls to mobile numbers can route these through SIM cards with unlimited mobile-to-mobile plans instead of expensive landline-to-mobile rates. Similarly, companies in regions with favorable mobile rates can reduce overall calling costs by strategically routing certain destinations through the GSM gateway.

International Presence Without Infrastructure

Companies establishing presence in new geographic markets can use local SIM cards to create virtual offices without physical locations. A business entering the European market, for instance, can install a local SIM card in the TG100 and route calls to their existing office system, providing customers with local contact numbers and avoiding international calling barriers.

Testing and Development

IT professionals and system integrators use the TG100 for testing GSM integration before deploying larger multi-port solutions. The single-channel configuration provides an affordable platform for validating call routing configurations, codec compatibility, and network integration without significant capital investment.