The Yeastar P550 VoIP PBX phone system is a compact and efficient communication solution tailored for small and medium-sized enterprises. It combines traditional PBX features with modern VoIP technology, unified communications, and flexible remote work capabilities. Supporting up to 50 users and 25 concurrent calls, the P550 is ideal for businesses with modest call volumes looking for a reliable, secure, and easy-to-manage telephony platform. With integrated Linkus UC Clients, the system supports seamless communication across desktops, mobile devices, and web browsers, ensuring productivity whether in the office or working remotely.

Product Features

Unified communications for SMEs
Connect voice, messaging, conferencing, voicemail, and collaboration tools in one system. Access features via Linkus UC Clients available on Windows, macOS, iOS, Android, and web browsers.

Flexible telephony integration
Supports both traditional PSTN lines and modern VoIP trunks, allowing businesses to mix analog and SIP-based infrastructure. Compatible with major SIP-based IP phones, softphones, and mobile extensions.

Built-in call center tools
Manage customer service efficiently with IVR, call queues, DID/DOD routing, call monitoring, and advanced transfer options. Includes WebRTC for browser-based calling and integration with Microsoft Teams.

Mobility and remote work ready
Remote extensions and mobile device support enable seamless connectivity for field workers and remote staff. Mobility extension and voicemail-to-email ensure constant availability.

Easy management and setup
Plug-and-play support for IP phones and intuitive web-based interface simplify system setup. Admins can configure trunks, users, call flows, and features with ease.

Advanced telephony features
Includes call forwarding, pickup, parking, barge-in monitoring, voicemail, intercom, conferencing, speed dial, fax to email, and WebRTC support for flexible operations.

Security and administration tools
Features secure SRTP/TLS communication, password policy enforcement, auto defense, IP blocklists, built-in SMTP server, and event alerts to safeguard system and user data.

Customizable and upgrade-ready
Supports subscription-based access to advanced features via Yeastar Enterprise or Ultimate Plans, enabling business growth and feature expansion as needed.

Product Specifications

• User capacity: up to 50 users
• Concurrent calls: up to 25 simultaneous calls
• Maximum analog ports (FXS/FXO): up to 8
• Maximum BRI ports: up to 8
• Maximum cellular (GSM/3G/4G) ports: up to 4
• Maximum E1/T1/J1 ports: not supported
• Expansion board: not supported
• External storage: 1 USB port for backup and storage

Business communication features

• BLF (Busy Lamp Field) support
• Business hours and holiday routing
• Call allow/block list
• Call recording and custom prompts
• Distinctive ringtones and DNIS
• Emergency numbers and alerts
• Music on hold and playlists
• Microsoft Teams integration
• Remote extensions and speed dial
• Fax to email and T.38 fax support
• Personal voicemail greeting and voicemail to email
• WebRTC audio calling support

Telephony and call management

• Call forwarding, pickup, parking, and waiting
• Call monitoring (listen, whisper, barge-in)
• Caller ID and routing based on CID/DID
• Conference rooms, ring groups, and queues
• IVR, DISA, DND, intercom
• Direct inward/outward dialing (DID/DOD)
• Dial by name and basic call reports

Administration and security tools

• Auto provisioning for supported IP phones
• Web-based admin and user portal
• Role-based access controls
• Dashboard with system health overview
• Bulk import/export for users and contacts
• Event logging and real-time notifications
• Built-in SMTP for email alerts
• Network drive support and system backup
• Operation logs for audit and troubleshooting
• Secure VoIP with SRTP and TLS encryption
• IP blocklist, static defense, and auto defense mechanisms