Yeastar TG400 4 Ports GSM VoIP Gateway

Yeastar TG400 4 Ports GSM VoIP Gateway connects four mobile SIM cards to VoIP networks with robust, enterprise-level performance. This quad-channel GSM gateway transforms GSM lines into SIP trunks, enabling cost-efficient mobile integration with IP PBX systems, cloud telephony or softswitches. Medium businesses, call centers, multi-branch operations, retail chains, rural deployments and organizations leveraging mobile tariffs select the TG400 for its stability, high call capacity, advanced routing and reliable GSM-to-VoIP conversion.

Utilize mobile networks for outbound traffic or failover trunks. Register four GSM SIMs as SIP trunks. Achieve clear, natural voice quality on calls. Implement intelligent least cost routing and automatic failover. Support remote sites without landlines. The TG400 provides scalable GSM connectivity in a compact, rack-mountable unit, perfect for businesses that require higher channel density than dual-port gateways while maintaining simplicity and cost control.

Detailed Use Cases and Compatibility

High-Volume Outbound and Inbound Calling

Businesses route large volumes of outbound calls through cost-effective GSM SIMs. The TG400 supports least cost routing by prefix, time or carrier, optimizing expenses. Inbound GSM calls route to IP extensions, queues or IVR menus. Ideal for telemarketing, customer support centers and sales teams with heavy mobile dialing.

Multi-Branch and Remote Site Connectivity

Organizations with multiple locations without fixed broadband use the TG400 to provide VoIP service over GSM. Each SIM handles local calling while connecting to central PBX for internal extensions and features. The gateway supports remote registration and secure tunneling, enabling unified communication across dispersed sites.

Failover and Redundancy Solutions

Enterprises add the TG400 as a backup trunk group. During SIP provider outages or internet failures, calls failover automatically to GSM lines. Inbound failover routes mobile calls to IP destinations. This setup ensures continuity for mission-critical lines in retail chains, field services or emergency services.

Call Termination and SIM Pooling

Termination providers or call shops use the TG400 to terminate international traffic via local SIMs. The gateway manages high call throughput with stable performance. Advanced number manipulation, SIM balance monitoring and channel grouping support efficient SIM pooling and load balancing.

Compatibility and Integration

The Yeastar TG400 integrates seamlessly with IP PBX platforms including Yeastar S-Series, P-Series, Asterisk, FreePBX, 3CX, Issabel, FusionPBX and most SIP-based systems. It supports GSM/UMTS SIM cards from global operators. Compatible with SIP trunks from cloud carriers and hybrid analog/GSM setups. Provisioning occurs via web GUI, auto-provisioning or Yeastar Device Management System.

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Technical Specifications

Port Configuration

• 4 × GSM channels (Quad-band 850/900/1800/1900 MHz)
• 1 × 10/100 Mbps Ethernet port
• Nano SIM card slots (4)

Voice Processing

• HD voice support (G.722, Opus wideband)
• Echo cancellation (G.168)
• Comfort noise generation
• Voice activity detection
• Adaptive jitter buffer

Telephony Features

• SIP RFC3261 compliant
• Caller ID presentation/restriction
• Call progress tone detection
• DTMF relay (RFC2833, Inband, SIP INFO)
• Call duration/SIM balance limitation
• Flexible dial plans and number manipulation
• Least cost routing, failover routing, SIM grouping
• USSD for SIM balance query

Network and Security

• NAT traversal (STUN, ICE)
• VLAN tagging (802.1Q)
• QoS support (DiffServ, ToS)
• TLS/SRTP encryption
• Web-based management GUI
• Auto provisioning via HTTP/HTTPS/TFTP
• SIM lock, blacklist/whitelist, signal strength monitoring

Physical Design

• Compact 1U rack-mountable chassis
• Dimensions: 213 mm × 160 mm × 44 mm
• Weight: approximately 1.0 kg
• Power: 12V/5A adapter (included)
• Operating temperature: 0°C to 40°C
• Humidity: 10% to 90% non-condensing

System Requirements

Active GSM SIM cards with voice/SMS service. Broadband internet or LAN connection for SIP registration. SIP server/PBX or cloud VoIP provider.

SIP protocol standards maintained by IETF. HD voice codec specifications detailed by ITU-T. Ethernet standards defined by IEEE 802.3.

Warranty, Support and Product Reliability

Aiconic Computers guarantees the Yeastar TG400 4 Ports GSM VoIP Gateway with a full 12-month manufacturer warranty covering defects in materials and workmanship. Our support team provides prompt assistance for SIM activation, channel configuration, routing optimization, signal troubleshooting and firmware updates. We stock only genuine Yeastar products from authorized distributors. Enjoy secure purchasing, fast delivery and dedicated customer service focused on your complete satisfaction.

This powerful quad-channel GSM gateway offers scalable mobile connectivity and cost optimization for VoIP environments. Maximize mobile network value and reliability with the Yeastar TG400 today.