Yeastar S20 is a powerful IP VoIP PBX system that can support up to 20 users and 10 concurrent calls. It is designed to help small businesses streamline their communication systems and enhance their productivity. In this essay, we will discuss the features, benefits, and specifications of the Yeastar S20, and explore how it can help small businesses improve their communication systems.

Features The Yeastar S20 is packed with features that can help businesses enhance their communication system. The following are some of the most important features of the Yeastar S20:
- SIP and IAX2 Protocols: The Yeastar S20 supports the SIP and IAX2 protocols, which are the most commonly used protocols in VoIP communication systems.
- IP Phone System: The Yeastar S20 supports IP phones, enabling businesses to make and receive calls over the internet.
- PSTN Connectivity: The S20 supports PSTN connectivity, enabling businesses to connect their traditional phone lines to the system.
- Voicemail and Auto Attendant: The Yeastar S20 comes with a voicemail and auto attendant feature that can handle calls and direct them to the appropriate department or individual.
- Call Forwarding and Transfer: The S20 supports call forwarding and transfer, enabling businesses to route calls to their mobile phones or other extensions.
- Conference Calling: The Yeastar S20 supports conference calling, enabling businesses to connect multiple parties on the same call.
- Call Recording: The S20 supports call recording, enabling businesses to record calls for quality control and training purposes.
- Caller ID: The Yeastar S20 supports caller ID, enabling businesses to identify who is calling before answering the call.
- Call Detail Records: The S20 generates call detail records (CDRs) that provide businesses with information about their call traffic, including call duration, destination, and cost.
- Web-Based Configuration: The Yeastar S20 can be configured through a web-based interface, which makes it easy for businesses to manage their communication system from anywhere.
Benefits The Yeastar S20 offers several benefits to small businesses, including:
- Cost Savings: The Yeastar S20 can help businesses save money on their communication systems by reducing the cost of long-distance and international calls.
- Scalability: The S20 is scalable, which means that businesses can add more users and features as their needs grow.
- Flexibility: The Yeastar S20 is flexible, which means that businesses can configure it to meet their specific needs and requirements.
- Productivity: The S20 can help businesses enhance their productivity by providing them with the tools they need to communicate effectively and efficiently.
- Reliability: The Yeastar S20 is a reliable communication system that can help businesses maintain high levels of uptime and availability.
- Easy to Use: The S20 is easy to use, which means that businesses can start using it immediately without any extensive training.
Specifications The Yeastar S20 has the following specifications:
- Processor: Dual-core 1GHz ARM Cortex A9 processor
- Memory: 512MB DDR3
- Storage: 4GB eMMC
- LAN Ports: 2 x 10/100/1000 Mbps
- WAN Ports: 1 x 10/100/1000 Mbps
- USB Ports: 1 x USB 2.0
- Audio Input: 1 x MIC
- Audio Output: 1 x Line Out
- Power: DC 12V 1A
- Dimensions: 220mm x 160mm x 30mm