Yeastar TG800 GSM VoIP Gateway for Enterprise Communications

The Yeastar TG800 is an eight-port GSM VoIP gateway that bridges cellular networks with IP-based phone systems. This device enables businesses to integrate mobile telephony into their existing PBX infrastructure while managing multiple GSM connections simultaneously. It serves medium to large organizations seeking to reduce mobile calling costs, establish geographic presence, or maintain communication redundancy across multiple carriers.

Technical Specifications

GSM Network Support

• Frequency Bands: Quad-band GSM 850/900/1800/1900MHz
• SIM Capacity: 8 standard SIM card slots
• Concurrent Calls: Up to 8 simultaneous voice channels
• Network Registration: Automatic carrier detection and registration

Voice Processing

• Supported Codecs: G.711A/U, G.722, G.726-32, G.729A, GSM
• Voice Activity Detection: Reduces bandwidth consumption during silence
• Comfort Noise Generation: Maintains natural call quality
• Echo Cancellation: G.168-2004 compliant (128ms tail length)
• DTMF Relay: RFC2833, SIP INFO, In-band methods

Network Connectivity

• Ethernet Interface: 1x 10/100Mbps RJ45 port
• Protocol Support: SIP v2.0 (RFC3261), TCP/UDP transport
• QoS: DiffServ, ToS/DSCP marking for traffic prioritization
• Network Features: Static IP, DHCP, PPPoE support

System Management

• Configuration: Web GUI, CLI via Telnet/SSH
• Monitoring: SNMP v2c, Syslog integration
• Security: MD5 authentication, IP filtering, SRTP encryption
• Firmware: Remote upgrade capability via HTTP/TFTP

Physical Specifications

• Dimensions: 440mm × 230mm × 44mm (17.3″ × 9.1″ × 1.7″)
• Mounting: 19-inch rack mountable (1U)
• Weight: 2.8kg (6.2 lbs)
• Power: AC 100-240V, 50/60Hz with internal power supply
• Operating Temperature: 0°C to 45°C (32°F to 113°F)
• Storage Temperature: -20°C to 65°C (-4°F to 149°F)
• Humidity: 10% to 90% non-condensing

Use Cases and Applications

Multi-Location Business Operations

Companies with branches across different regions can use the TG800 to establish local presence through regional SIM cards. Customers calling these local numbers connect through the gateway to the central PBX system, creating the perception of local offices without physical infrastructure. This approach works particularly well for sales organizations, customer service centers, and logistics companies.

International Calling Cost Reduction

Businesses making frequent international calls benefit from routing these calls through local SIM cards in destination countries. For instance, a company in the United States can route calls to European contacts through European SIM cards installed in the Yeastar TG800, avoiding expensive international landline rates. Organizations with overseas suppliers or clients see substantial monthly savings.

Carrier Redundancy and Failover

The eight-port configuration allows connection to multiple cellular carriers simultaneously, ensuring communication continuity if one network experiences outages. Healthcare facilities, emergency services, and financial institutions deploy this redundancy model to maintain critical communications. The gateway automatically switches to available carriers when primary networks fail.

Mobile-to-Landline Call Termination

Organizations can receive calls on their GSM numbers and terminate them through their VoIP system, enabling features like voicemail, call recording, and automated attendants for mobile lines. This proves valuable for businesses maintaining legacy mobile numbers while modernizing their communication infrastructure.

SMS-Enabled Business Communications

Beyond voice, the TG800 supports SMS messaging through its GSM connections, allowing integration with business applications. Companies use this capability for automated notifications, two-factor authentication, appointment reminders, and customer alerts without separate SMS gateway services. The integration with existing PBX systems enables centralized communication management.

Temporary and Remote Site Connectivity

Construction sites, pop-up retail locations, and temporary event spaces can establish full phone systems using cellular connectivity instead of waiting for landline installation. The gateway provides enterprise-grade features through GSM networks, enabling professional communications from day one of operations. This flexibility particularly benefits industries with frequently changing work locations.