Yeastar S20 – S-Series VoIP PBX for Small Business

Yeastar S20 – S-Series VoIP PBX for Small Business provides powerful, scalable IP telephony in a compact, easy-to-manage system. This entry-level PBX supports up to 20 users and 10 concurrent calls out of the box, with options to expand capacity through modular add-ons. Small offices, startups, retail shops, professional services and home-based businesses choose the S20 for its affordability, intuitive web interface and rich feature set without requiring advanced IT expertise.

Deploy professional communication quickly. Handle incoming and outgoing calls with HD voice quality. Set up extensions, IVR menus and call queues effortlessly. Enable remote workers with mobile apps and softphones. Integrate CRM and productivity tools seamlessly. The S20 delivers enterprise-grade features at a small-business price, making it ideal for growing teams that need reliable telephony today and scalability tomorrow.

Detailed Use Cases and Compatibility

Small Office and Startup Environments

Startups equip the S20 to manage company-wide calls with professional greetings, auto-attendant and ring groups. Receptionists route calls efficiently using visual extensions status. Teams benefit from internal intercom, call recording for training and voicemail-to-email notifications. The compact desktop form factor fits neatly in small spaces.

Retail and Customer Service Counters

Retail businesses use the S20 for point-of-sale extensions and customer support lines. Call queues ensure no call goes unanswered during peak hours. IVR directs customers to departments or self-service options. Managers monitor call volume and agent performance through the intuitive dashboard.

Professional Services and Consulting Firms

Law firms, accountants and consultants configure multiple trunks for client lines. Features like call forwarding, follow-me and mobile linkage keep professionals reachable on the go. CRM integration pops client details on incoming calls. Secure remote access supports hybrid work models.

Home-Based and Remote Teams

Distributed teams connect via the S20 using Yealink or third-party IP phones, softphones and mobile apps. The system supports VPN-free remote extensions with secure tunneling. Linkus UC app enables voice, video, chat and presence from smartphones or computers.

Compatibility and Integration

The Yeastar S20 supports standard SIP trunks and IP phones from Yealink, Fanvil, Snom, Grandstream and many others. It integrates with popular CRM platforms including Salesforce, Zoho, HubSpot and Microsoft Dynamics via API. Linkus UC & Mobile app provides unified communications. Compatible with analog gateways, GSM modules and E1/T1 PRI cards for legacy lines. Works with major VoIP providers worldwide.

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Technical Specifications

Capacity

• Users/Extensions: 20 (expandable)
• Concurrent Calls: 10 (expandable)
• Voicemail: 20 hours (expandable)
• Concurrent Auto Attendant: 1

Hardware Interfaces

• 1 × RJ45 Gigabit Ethernet WAN/LAN
• 1 × USB 2.0 port
• 1 × Micro SD slot (for recording storage)
• Modular expansion: FXS, FXO, GSM/3G/4G, E1/T1/PRI

Voice and Audio

• HD voice (G.722, Opus)
• Echo cancellation
• Comfort noise generation
• Voice activity detection

Telephony Features

• IVR (Auto Attendant) with multi-level support
• Call queues, ring groups, call forwarding
• Call recording (automatic/manual)
• Voicemail to email, fax to email
• Conference bridge (up to 3 parties)
• Time conditions, DISA, caller ID routing

Unified Communications

• Linkus UC & Mobile app (voice, video, chat, presence, screen sharing)
• WebRTC softphone
• Remote extensions with NAT traversal

Management and Security

• Web-based GUI (intuitive drag-and-drop)
• Auto provisioning for Yealink and other brands
• TLS/SRTP encryption
• Firewall, VPN server/client
• Fail2Ban intrusion prevention

Physical Design

• Compact desktop chassis
• Dimensions: 160 mm × 160 mm × 30 mm
• Weight: approximately 0.5 kg
• Power: 12V/1A adapter (included)
• Fanless operation for silent performance

System Requirements

Standard broadband internet connection. SIP trunk or analog/GSM gateway for external lines. Compatible IP phones or softphones.

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 S20 – S-Series VoIP PBX for Small Business with a full 12-month manufacturer warranty covering defects in materials and workmanship. Our support team offers prompt assistance for initial setup, trunk configuration, extension provisioning and feature customization. We stock only genuine Yeastar products from authorized distributors. Enjoy secure purchasing, fast delivery and dedicated customer service focused on your complete satisfaction.

This compact yet feature-rich PBX delivers professional communication tools tailored for small businesses. Grow your telephony infrastructure confidently with the Yeastar S20 today.