Yeastar S50 VoIP PBX: Business Phone System for Growing Companies

The Yeastar S50 VoIP PBX delivers enterprise-grade communication capabilities for small to medium-sized businesses requiring up to 50 users. This IP-based phone system combines traditional PBX functionality with modern unified communications features including voicemail, call recording, and auto-attendant services. Growing organizations seeking scalable, cost-effective telephony infrastructure without recurring licensing fees will find this system ideal for professional communication management.

Technical Specifications

System Capacity

• Maximum Users: 50 extensions
• Concurrent Calls: 25 simultaneous connections
• SIP Trunk Capacity: 25 SIP trunk registrations
• Conference Rooms: 8 rooms with 10 participants each
• Voicemail Boxes: 50 individual mailboxes
• Call Recording Storage: 500 hours (expandable via external storage)

Expansion Capabilities

• Expansion Slots: 2 internal module slots
• Supported Modules: FXO, FXS, GSM, BRI, E1/T1, extension cards
• Maximum FXO Ports: 8 analog line connections
• Maximum FXS Ports: 8 analog phone connections
• GSM Channels: Up to 4 cellular connections

Network & Connectivity

• Ethernet Ports: 2 × 10/100/1000 Mbps (LAN/WAN)
• Network Protocols: SIP, IAX2, TCP/IP, UDP, RTP, SRTP
• VPN Support: OpenVPN, L2TP, PPTP for site-to-site connectivity
• QoS: 802.1p/Q VLAN tagging, ToS/DiffServ marking
• Network Security: Firewall, intrusion detection, IP whitelist/blacklist

Voice Features

• Codec Support: G.711a/μ, G.722, G.726, G.729, GSM, iLBC, Opus
• DTMF Methods: RFC 2833, SIP INFO, in-band
• Fax Support: T.38 fax over IP protocol
• Music on Hold: MP3, WAV file formats with custom audio upload
• Echo Cancellation: ITU-T G.168 compliant hardware DSP

Call Management Features

• Auto-Attendant: Multi-level IVR with custom greetings and routing
• Call Recording: Automatic, on-demand, or scheduled recording
• Call Queues: ACD distribution with agent status monitoring
• Ring Groups: Hunt groups, simultaneous ring, sequential ring
• Time Conditions: Schedule-based call routing and feature activation
• Voicemail: Voicemail-to-email, visual voicemail, custom greetings

Management & Integration

• Web Interface: Browser-based administration (Chrome, Firefox, Edge)
• API Support: RESTful API for third-party integration
• LDAP Integration: Active Directory synchronization for contacts
• CTI Support: Screen pop, click-to-dial for CRM integration
• Reporting: CDR logs, call statistics, system monitoring
• Remote Management: Cloud-based management through MyPBX portal

Power & Environmental

• Power Supply: 100-240V AC, 50/60Hz auto-sensing
• Power Consumption: 25W typical, 35W maximum
• Operating Temperature: 0°C to 40°C (32°F to 104°F)
• Storage Temperature: -20°C to 70°C (-4°F to 158°F)
• Humidity: 10% to 90% non-condensing

Physical Dimensions

• Form Factor: 1U rackmount chassis
• Dimensions: 440mm × 235mm × 44mm (W × D × H)
• Weight: 2.8kg
• Mounting Options: Rack-mount brackets included, desktop placement

Storage & Backup

• Internal Storage: 500GB hard drive for recordings and logs
• USB Ports: 2 × USB 2.0 for external storage expansion
• Backup Methods: Automatic scheduled backup, manual backup
• Configuration Export: XML-based configuration file export

Use Cases & Applications

Small Business Communication

Companies with 20-50 employees establish professional phone systems without enterprise-level budgets. The Yeastar S50 VoIP PBX provides call routing, voicemail, and conference capabilities previously requiring expensive key systems or hosted services. Retail stores, professional services firms, and manufacturing facilities benefit from auto-attendant functionality presenting professional images to customers while controlling communication costs.

Multi-Location Operations

Organizations operating across multiple sites create unified communication environments through VPN connectivity. The S50 system enables free extension-to-extension dialing between headquarters and branch locations, eliminating long-distance charges. For instance, restaurants with several locations route incoming calls to available managers regardless of physical location, improving customer service responsiveness.

Call Center Deployment

Customer service teams utilize built-in ACD queues for efficient call distribution. The Yeastar S50 VoIP PBX monitors agent status, records customer interactions for quality assurance, and generates performance reports without additional software purchases. Moreover, small outsourcing firms support multiple client campaigns through separate call queues and custom greetings.

Legacy System Replacement

Businesses transitioning from aging key systems or traditional PBX equipment gain modern features while preserving analog investments. The S50 accepts FXO modules for existing phone line connectivity and FXS modules for analog phones, fax machines, and door entry systems. Consequently, organizations migrate incrementally without replacing functional equipment or disrupting operational workflows.

Remote Workforce Integration

Companies supporting remote employees extend office phone systems to home offices through SIP extensions. The Yeastar S50 VoIP PBX enables softphone applications on computers and smartphones, maintaining consistent extension dialing and feature access. Additionally, traveling salespeople receive calls forwarded to mobile devices while preserving caller ID and company identity.

Cost Optimization Strategy

Organizations reduce telecommunication expenses by routing calls through SIP trunks instead of traditional phone lines. The S50 system supports multiple SIP providers enabling intelligent routing based on destination, time of day, or cost parameters. Furthermore, businesses leverage GSM modules for mobile network connectivity in regions with favorable cellular rates or unlimited mobile plans.