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What is a Cloud PBX?

Cloud PBX (Cloud-based Private Branch Exchange) is a phone system that operates in the cloud rather than using traditional on-premises hardware.

It leverages VoIP (Voice over Internet Protocol) technology to handle incoming and outgoing calls over the Internet. Instead of physical phone lines, users connect to the Cloud PBX using IP phones, softphones (software-based phones), or mobile devices with dedicated applications.

Cloud phone systems are hosted by service providers, eliminating costly infrastructure since they are billed on a flexible subscription plan.

Business Communications

Customer Experience

Yeastar Cloud PBX: An all-inclusive Solution

Connect and collaborate with your team and customers through voice, video, messages, and more across any device and location.

Make and receive calls with your preferred device, from anywhere

Call from your phone with the iOS/Android mobile app.

Call from computers with the Windows/macOS desktop app.

Call from web browsers using the feature-packed web client.

Click to call and receive screen pop-ups with the Chrome extension.

Work from Anywhere

Go beyond phone calls to multiple communications channels

Make audio and video calls and easily switch between them.

See who is available, on a call, away, on a break or trip, etc.

Make video meetings with live chats and screen sharing.

Create 1:1 and group chats and share files with your colleagues.

Unified Communications

Simplify call handling and increase call efficiency

Transfer a live call among devices without disrupting it.

Assign frequently used features to specific function keys.

Perform various call operations with customizable hotkeys.

Click to dial on your computer while still using a physical desk phone.

Call Efficiency

Simplify call dispatching and optimize call flows

See real-time internal, inbound, and outbound call activities.

Manage calls with drag-and-drop and simple clicks.

View and switch the presence extensions.

Monitor the status of queues, ring groups, group voicemails, etc.

Operator Panel

Engage customers across all channels

Offer customers more options and convenience to contact you, whether it is by phone, via text messages, or through social media.

Empower agents and supervisors with advanced tools

Monitor and manage queuing calls via web-based panels.

View key performance metrics on a real-time Wallboard.

Access graphical, downloadable, and schedulable reports.

Take advantage of call monitoring, recording, queue callback, etc.

Call Center

Add interactive and personalized ways to talk to customers

Manage messages from different channels in one place.

Proactively engage customers on the channels they prefer.

Auto-match incoming messages to existing contacts.

Transfer chats to colleagues and collaborate in the same interface.

Omnichannel Messaging

Cloud PBX

99.99% uptime and 24/7 monitoring

Cloud PBX

Fully redundant, high availability

Cloud PBX

Strategically located data centers powered by AWS

Why Switch to a Cloud PBX Provider?

Cost less than legacy solutions


Cloud phone system eliminates the expensive hardware and maintenance costs of traditional phone systems. With the cloud, businesses reduce upfront investments and pay only for the services they use.

Get more advanced UC features


Enjoy an all-inclusive business communication solution with features like auto-attendants, call logs, and video conferencing. These features improve collaboration among teams.

Simplify your tech stack


By using a cloud-based solution, you can consolidate all your communication tools into a single platform. This simplifies your technology setup, reduces complexity, and streamlines management. No need to deal with multiple vendors or applications—just one integrated solution.

Industry-grade reliability


Cloud PBX providers have redundant infrastructure and data centers, ensuring high availability and minimal downtime. They often offer Service Level Agreements (SLAs) guaranteeing uptime and performance. This is crucial
for businesses that rely on uninterrupted communication.

Rich ready integrations


Cloud PBX providers seamlessly integrate with popular business applications such as CRM systems, helpdesk software, Microsoft Teams and more 3-party tools. These integrations facilitate information sharing and improve workflows across different platforms, maximizing efficiency.

No server maintenance


By transitioning to the cloud, you remove the need for on-premises servers and their associated maintenance tasks. The cloud PBX provider takes care of server maintenance, upgrades, security patches, and backups, freeing up your IT staff to focus on other strategic initiatives.

Connect your tech stack

Integrate Yeastar with popular CRM, helpdesk, productivity tools, and more to keep your business in sync, or customize your own experience with developer tools.

Microsoft Teams


Microsoft Entra ID (Azure Active Directory)

Active Directory





Zoho CRM






Zoho Desk

Oracle Hospitality Opera

Micros Fidelio

For Service Providers

Your Fast Track to Launching Hosted
Voice Services with Ease

Whether you are new to the hosted UCaaS market or an established service provider looking to upgrade your offerings, Yeastar offers a ready-to-go solution with low-barrier entry.

Your Business in Control

Package your SIP trunking & other services.

Control your pricing to stay competitive.

Own your customer relationship.

Sell under your brand if you prefer.

We don’t compete with you.

For Service Providers

Fully Hosted by Yeastar

Take the shortcut to MSP success

Focus on delivering exceptional voice services without the hassle of managing infrastructure. Go to market faster and scale confidently.

Your infrastructure is in good hands

Build your voice service offerings over clusters of active/active servers well-maintained by Yeastar and protected against potential downtime.

For Service Providers

Central Management

Cloud PBX

Create & Scale

Cloud PBX

Provisioning Templates

Cloud PBX

Scheduled Tasks

Cloud PBX

Performance Dashboard

Cloud PBX

30+ Tyeps of Alarms

Cloud PBX

Central Repository

All the features you need without complexity

We design every feature to empower business teams to stay connected, boost productivity, and foster stronger customer relationships.

Standard Plan Enterprise Plan Ultimate Plan

Deployment Mode Appliance Appliance, Software,
Appliance, Software,

Telephony Features

Call Forwarding

Call Monitoring (Listen/Whisper/Barge-in)

Call Parking

Call Pickup

Call Transfer (Attended/Blind)

Call Waiting

Call Flip/Switch

IVR (Multi-level/Multi-lingual/Time-based)


Ring Group

Paging & Intercom

Conference Rooms

CDR & Basic Reports

Dial by Name


Caller ID

CID-based & DID-based Call Routing

DID (Direct Inward Dialing)

DND (Do Not Disturb)

DOD (Direct Outward Dialing)


Business Features

Call Recording

Call Allow/Block List

BLF Support

Busy Camp-on

Business Hours & Holidays


Custom Prompts

Distinctive Ringtone

Music on Hold

MOH Playlist & Streaming

T.38 Fax

TAPI Driver

Fax to Email


Group Voicemail

Voicemail to Email

LDAP Server

PIN List

Speed Dial

Emergency Number

Emergency Notifications

SIP Forking

IP Phone Concurrent Registrations

CTI for Desk Phone Control

Function Keys


Administration & Security

Web-based Management Portal

Graphical Dashboard

Auto Provisioning

Bulk Import & Export

Extension Group & Organization

User Role & Permission

Operation Logs

Event Logs

Event Notifications

Backup and Restore


Built-in SMTP Server

AMI (Asterisk Manager Interface)

Network DriveOnly supported on the Appliance Edition

SNMP Support


Hot StandbyThis feature is only supported by the Appliance and Software Edition and it requires an additional PBX redundancy server to function. For more information, please contact us.


SRTP & TLS Call Encryption

Auto & Static Defense

Global Anti-hacking IP Blocklist


Password Policy Enforcement

Two-factor Authentication (2FA)

Allowed Country IP's & Codes

Outbound Call Frequency Restriction

Unified Communications

Linkus UC Clients

Linkus Web Client

Linkus Mobile Client (iOS & Android)

Linkus Desktop Client (Windows & MacOS)

Linkus Google Chrome Extension

Operator Panel

Unlimited Users

Dispatch Active Calls
(Redirect, Transfer, Hang up, Park, Monitor)

Monitor Call Status
(Inbound, Outbound, Extension, Parked Calls, etc.)

Unified Presence

Control Extension Presence


Custom Presence description

Personal & Company Contacts

Audio Conferencing

Voicemail Transcription

Call Pop-up URL

Door Phone Video Preview

Team Chat

1:1 or Group Chat with Colleagues

File & Image Sharing

Push Notification

Sync Across Linkus UC Clients

Remote Access Service Since the Cloud Edition is inherently accessible from anywhere, Remote Access Service is only for the Appliance & Software Edition

Custom PBX Domain Name (FQDN)

Remote & Secure PBX Web Portal Access

Linkus UC Clients Remote Connection

LDAP Server Remote Access

Remote SIP Service Since the Cloud Edition is inherently accessible from anywhere, Remote SIP Service is only for the Appliance & Software Edition.

Hassle-free Remote SIP Registration Register your remote IP phones, branch office PBXs, VoIP gateways, and alike remote SIP endpoints to the PBX easily as if they were deployed on your PBX's intranet.

WebRTC Trunk

No Port Portwarding & NAT Issues

Call Center

Advanced Skill-based Routing & Queue Callback

Switchboard-type Queue Panel

Real-time Wallboard

SLA Monitoring & Threshold Notifications

Insightful Call Center Reports

Omnichannel Messaging

Unlimited SMS Trunks & WhatsApp Accounts Integration

Central Message Inbox

Automatic Contacts Matching

Message to Queue

Chat Assignment & Transfer

Elevate Chats to Calls in One Click

Message Detailed Records

Trunk SMS API for ITSP


PBX-native Contacts Management

Separate Permission Control Per Phonebook

CRM Contacts Synchronization

Call Accounting

Custom Rates Applied to Outbound Calls

Analysis Report on Telecom Expenses

Voicemail Annoucement

Call Notification for Group Voicemails

Listen to Messages & Call Back Directly over the Phone

Never Miss an Urgent Message

Ideal to Support Emergency After-hour Services

CRM Integration

Click to Call CRM Contacts

Incoming Call Popups

Auto Call Journal

Contacts Synchronization

Support for Hubspot, Zoho, Salesforce, Bitrix24, and Odoo

Helpdesk Integration

New Ticket Auto-creation

Click to Call Helpdesk Contacts

Incoming Call Popup

Auto Call Journal

Contacts Synchronization

Support for Zendesk and Zoho Desk

Microsoft 365 Integration

Microsoft Teams Integration

Outlook Integration

Microsoft Entra ID (Azure Active Directory)

User Sync & Single Sign-on (SSO)

Remote ArchivingThe Cloud Edition requires Ultimate Plan to use the Remote Archiving feature.

Archive Files to External Servers

Call Recordings Archival

System Backups Archival

Support FTP, SFTP, Amazon S3, Google Cloud Storage

Windows Active Directory Integration

User, Organization Unit, Group Synchronization

Auto Extension Assignment for New User

Single Sign-on (SSO)

Faster and Easier Administration

Video Conferencing

Bulk Email & Instant Link Invitation

HD Audio and Video

Screen Sharing

In-meeting Team Chat

Video Calls

Video Calls on Linkus Web Client

Video Calls on Linkus Desktop Client

Video Calls on Linkus Mobile Client

Linkus Client SDK

Integrate voice calling to any application easily

Web/Browser SDK

Mobile & Pad SDKs: Android, iOS

Desktop SDKs: Windows, MacOS

Feature-rich voice experience HD Calling, Call Control, Call Recording, Call History, Notifications, and more features

Rich, Programmable Code Samples and UI

Secure Authentication with Tokens

Faster and standarized development

Disaster Recovery The disaster recovery feature is supported on the Software Edtion only and requires an additional PBX redundancy server to function. For more information, please contact us.

Cross-region Active-standby Redundancy

Automatic Failure Detection & Fallback

Real-time Data Replication

Secure SD-WAN or VPN Remote Networking

Disaster Recovery The disaster recovery feature requires an additional PBX redundancy server to function. For more information, please contact us.

Cross-region Active-standby Redundancy

Automatic Failure Detection & Fallback

Real-time Data Replication

Secure SD-WAN or VPN Remote Networking

Hotel PMS Integration *Not supported by the Cloud Edition and the P520 appliance model. Optional

Room Status Synchronization

Wake-up Call Scheduling

Call Accounting & Minibar Charging

Guest Information and Room Move

cloud pbx

Our new Yeastar phone system has not just improved our operations but transformed our business. We’re more connected, efficient, and productive than ever before. The journey to get here was worth every step, and the results speak for themselves.

WM Solutions

I couldn’t be happier with the positive impact the Yeastar Hosted System has had on our practice. This decision has transformed the way we operate and has significantly improved our ability to provide quality healthcare to our patients.

Leesbrook Surgery

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Common Questions about Cloud Phone Systems

How does Cloud PBX works?


A cloud-based PBX operates entirely over the Internet and is managed remotely. Its deployment and setup are effortless, relieving businesses from IT burdens.

Typically, the cloud phone service is obtained via subscription with a service provider. With this setup, calls can be made and received using IP phones, mobile devices, or other compatible devices. Voice traffic is transmitted over an Internet connection, which connects to data
centers located within the cloud.

To see an intuitive diagram of how it works.↗

How are cloud phone systems different from on-prem ones?


  • Infrastructure: On-premises systems require physical hardware installed and maintained on-site, while cloud phone systems operate in the cloud without the need for on-site equipment.
  • Maintenance and Updates: With on-premises systems, businesses are responsible for maintaining and updating themselves. Hosted phone systems handle these tasks at the service provider’s end.
  • Scalability and Flexibility: Cloud phone systems allow businesses to add or remove users and features with just a few clicks. On-premises systems may require purchasing and configuring additional hardware.
  • Cost Structure: On-premises systems involve upfront capital expenditures and ongoing maintenance costs. Cloud PBX operates on a subscription-based model with predictable monthly fees.
  • Reliability and Redundancy: Virtual PBX often have built-in redundancy and multiple data centers, ensuring high availability.
  • Remote Accessibility: Cloud phone systems allow users to make and receive calls from anywhere with an internet connection.

Why choose Yeastar Cloud PBX?


  • More than a PBX: Yeastar Cloud PBX is an all-in-one solution for modern business. Empower your team with inbuilt call center solution, Linkus,
    omnichannel messaging, and more advanced VoIP features in one package.
  • Easy Central Management: Simply your UCaaS service delivery and support with task management, provisioning templates, and more.
  • SIP Trunking & IP Phones Options: Yeastar Cloud PBX is interoperable with over 100+ SIP trunk providers and supports auto-provisioning various SIP phones. That means easier setup and
    more savings.
  • Open Ecosystem: Yeastar phone system is integrated with Microsoft Teams, popular CRMs, and more 3rd-party platforms to drive teamwork productivity and customer experience.
    Moreover, we are setting foot on the contact center market, introducing WhatsApp and SMS integration to the P-Series Phone System for an omnichannel messaging experience.

Can I connect my existing PBX to the cloud?


Yes. Yeastar allows you to connect your existing on-premises PBX to the cloud using SIP trunking. Instead of traditional phone lines or primary rate interfaces (PRI), your PBX need to connect to the public switched telephone network (PSTN) through the internet.

SIP trunking offers a hybrid solution that enables the integration of legacy systems with cloud-based services. That means you have the option to gradually migrate to the cloud PBX, ensuring uninterrupted communication for your business.