
The advised replacement is P570 PBX System.
Supporting approximately 500 users and 120 concurrent calls, Yeastar P570 shares the exact same user capacity as S300 VoIP PBX while offering a greater degree of performance, dependability, and ease of use. With Yeastar P570, you can anticipate a complete variety of Unified Communications includes plus richer out-of-box integrations that power connections today and tomorrow.

Advanced PBX functions
Complete Unified Communications: video, message, call center, applications ...
Easier to use and handle
Rich out-of-box integrations
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S300 VoIP PBX (End-of-Sale )
Support approximately 500 users, Yeastar S300 delivers enterprise-class IP telephony services with a strong existence in scalability, mobility, 3rd-party integration, merged communications, and the ease of usage and management.
Specifications
300 Users (expandable to 500)
60 Concurrent Calls (expandable to 120)
As much as 24 FXS/FXO/BRI Ports
Up to 6 GSM/CDMA/3G/ 4G Channels
As much as 3 E1/T1/PRI Ports
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Our Awards
Simple to utilize and manageEasy to use with plug-and-play, phone automobile provisioning, and intuitive GUI.
Full-featured + Robust UCConnect and team up any way, on any gadget with total function set.
Remote ManagementReduce IT & upkeep expenses with highly-secure remote monitor and control.

Reliability over yearsFree lifetime software application upgrade plus high-end security to ensure reliability over years
Connect, communicate and team up the way you like
With S300 to work with Yeastar Linkus UC softphone and Linkus Cloud Service, experience the ultimate benefit of operating anywhere, on any gadget
Connect
Eliminate complexity and link on any gadget anywhere with Linkus UC Softphone.
Communicate
Voice, conferencing, messaging. Get all advanced features for smarter conversations.
Collaborate
Corporate Directory. Presence. File Sharing. It has to do with the team-up.
Salesforce CRM, Microsoft Dynamics 365, Outlook Contacts, Google Contacts ...
Scale and Customize
Unique modular style for extra flexibility

Yeastar S300 VoIP PBX permits 3 Expansion Boards to tailor FXS, FXO, ISDN BRI, GSM/3G/4G, or E1/T1/PRI port, and supports 2 D30 module for user/concurrent call expansion.
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Powerful Remote Management
Gain from a highly safe platform to monitor and manage your PBX system(s) remotely and centrally. Whether you are a phone system end user or a IT reseller, Yeastar Remote Management tool is here to free you from technical headaches and decrease IT & upkeep expenses.
Robust Feature Set Crafted for Your Business Needs
Complete Built-in Features
From fundamental call routing, IVR to sophisticated call conferencing and recording, Yeastar S-Series VoIP PBX provides you with extensive functions without extra licensing charges.
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Extra Capacity with App Center
Independent from the main structure of the system, App Center enables you to add and manage Apps individually for additional functionality like hotel app, billing, call center integration, etc.
Rich Robust API
Open immense chance with rich built-in API user interfaces, which enable you to link your phone system with third-party web applications or software to fulfill specific requirements.
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Supported IP Phones
Yeastar S-Series assistance automobile provisioning with many SIP/IP phone brands and models.
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Microsoft Teams Integration
Enable business voice to Microsoft Teams users and include advanced functions such as IVR, Call Forwarding, etc on your Teams.
Branch Office Solution
Interconnect multisite with ease and advantage from totally free and smooth inter-office communications.
Call Center Integration
Support combination with QueueMetrics and Asternic Call Center to drive company success.
CRM Integration
Boost service efficiency with screen-pop upon calls and more combination features.
Hospitality Solution
Streamline hotel operations with Hotel PMS Integration, Hotel App, and more functionalities.
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Related S-Series Model
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S412 VoIP PBX
Flexible and modular VoIP PBX with up to 12 FXS Extensions and up to 4 CO/BRI lines.