The Yeastar S50 VoIP PBX phone system is a compact, modular IP-PBX designed to support up to 50 users and 25 concurrent calls, making it ideal for small businesses that need enterprise-grade features without high complexity or cost. Housed in a 1U rack-mountable chassis, the S50 supports a combination of telephony interfaces including analog (FXS/FXO), ISDN BRI, and GSM/3G for flexible connectivity options. Powered by Asterisk 13 and advanced processor technology, it delivers reliable performance with minimal maintenance. The S50 supports SIP trunking, VoIP extensions, voicemail, IVR, call recording, and advanced call features—all manageable via an intuitive web interface.

Product Features

Scalable communications for small businesses
Supports up to 50 users and 25 concurrent calls, ideal for small offices and startups seeking scalable, all-in-one telephony.

Flexible telephony interface options
Supports module-based customization for:

• Up to 8 analog ports
• Up to 8 ISDN BRI ports
• Up to 4 GSM/3G ports

Rich SIP and VoIP capabilities
Includes support for 50 SIP trunks, SIP forking, and VoIP integrations, allowing seamless connectivity with IP phones and cloud services.

Advanced call management features
Includes IVR, call recording, voicemail-to-email, paging/intercom, music on hold, call routing, fax to email, and more.

Remote user and site connectivity
Supports secure, remote user access and multi-site deployments through VPN, STUN, and DDNS services.

Easy installation and intuitive control
Web-based management, auto-provisioning, plug-and-play setup, and graphical dashboards simplify deployment and administration.

Reliable and energy-efficient design
Low power consumption (2.1W–18.5W) with one of the highest MTBF ratings in the industry. Designed for 24/7 operation.

Future-ready expandability
Supports additional features and apps via Yeastar App Center and expansion modules, including LDAP, auto provisioning, and more.

Product Specifications

• User capacity: 50 users
• Concurrent calls: Up to 25
• VoIP trunks supported: 50
• Max analog ports: 8
• Max BRI ports: 8
• Max GSM/3G ports: 4
• Max E1/T1/J1 ports: Not supported
• Protocols supported: SIP (RFC3261), IAX2
• Transport protocols: UDP, TCP, TLS, SRTP
• Supported codecs:
  • Audio: G.711 (a/μ-law), G.722, G.726, G.729A, GSM, Speex, ADPCM, iLBC
  • Video: H.263, H.263P, H.264, MPEG4
• DTMF support: In-band, RFC4733, SIP INFO
• LAN/WAN ports: 1 × LAN and 1 × WAN (10/100/1000 Mbps)
• IP services: Static IP, DHCP, VPN, Firewall, VLAN, DDNS, PPPoE, QoS, Static NAT, STUN
• Voicemail storage: 5,000 minutes (expandable)
• Firewall and T.38 fax: Supported
• External storage: SD card
• USB: Not available
• Power supply: AC 100–240V, 50/60Hz, 0.6A max
• Power consumption: 2.1–18.5 W
• Dimensions: 34 × 21 × 4.4 cm
• Weight: 1.48 kg
• Mounting: 1U rack-mountable