S20, Telecom, PBX, Yeastar, 20 Users, 10 Concurrent Calls, Desktop / Wall-Mountable
Ultra-compact standalone VoIP PBX system supporting up to 20 users and 10 concurrent calls with 2 modular telephony slots.
Product Overview
The Yeastar S20 is an ultra-compact, stand-alone VoIP PBX system engineered for small offices and remote branches with up to 20 users. Built on Yeastar's robust Asterisk-based hardware architecture, the S20 delivers enterprise-level calling features, seamless reliability, and energy-efficient performance in a pocket-sized form factor. Equipped with 2 onboard module slots, the S20 allows businesses to customize physical connectivity with up to 4 FXS/FXO ports, 4 BRI ports, or 1 GSM/3G/4G channel. It includes full Linkus UC softphone compatibility, built-in IVR auto-attendant, conference calling, and automated call recording via TF card storage.
Why Buy This Product
Pocket-Sized Powerhouse
Measures just 160 x 160 x 30 mm and consumes under 11 watts, making it ideal for tight spaces and low utility costs.
20 SIP Trunks Included
Connect multiple VoIP service providers and branch office IP links without purchasing trunk licenses.
Linkus Mobile & PC Extension
Employees can make and receive company calls, check voicemails, and chat from their personal smartphones or laptops.
Best for These Applications
Small Commercial Offices
Offices with 5 to 20 staff needing professional automated greetings and extension transfers.
Branch Locations
Remote company branches interconnected with headquarter phone systems over SIP.
Boutique Agencies
Design studios, law chambers, and consulting firms requiring call recording and mobile flexibility.
Key Advantages
- Extremely Low Power Consumption:Operating power draw of just 1.8W to 10.6W ensures whisper-quiet operation and minimal thermal load.
- TF Card Call Recording:Add up to 64GB micro SD card for automatic recording of all incoming and outgoing conversations.
- Intuitive Web Management:Metro-style graphical interface makes extension setup, call routing, and trunk configuration simple.
Frequently Asked Questions
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Weight | 0.3 |
| Shipping Weight | 0.8 |
| User Capacity | 20 |
| Max Ip Users | 20 |
| Concurrent Calls | 10 |
| Analog Extensions | 4 |
| Co Lines | 4 |
| Bri Ports | 4 |
| Gsm Channels | 1 |
| Cellular Ports | 1 |
| Expansion Slots | 2 |
| Sip Trunks | 20 |
| Voip Channels | 10 |
| Voicemail Channels | 4 |
| Voicemail Storage | 5,000 minutes (built-in internal flash) |
| Audio Conferencing | Integrated Multi-Party Conference |
| Call Detail Records | Built-in CDR storage |
| System Architecture | Ultra-Compact Embedded IP PBX System |
| Power Supply | 12V DC, 1A External Power Adapter |
| Power Consumption | 1.8 - 10.6W (Energy Efficient) |
| Mounting Form Factor | Desktop / Wall-Mountable |
| Dimensions | 160 x 160 x 30 mm |
| Weight | 0.3 kg |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Ethernet Interfaces | 2 x 10/100 Mbps RJ45 Ports (LAN/WAN) |
| Sd Card Slot | 1 x TF/MicroSD Card Slot (up to 64GB) |
| Voip Protocols | SIP (RFC3261), IAX2, TLS, SRTP, IPv4, IPv6 |
| Audio Codecs | G.711a, G.711u, G.722 (HD Voice), G.726, G.729A, GSM, iLBC, Opus |
| Certifications | CE, FCC, RoHS |
| Stock | 10 |
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