Embrace Boundless Communications

Easy to use, optimal, and scalable, Yeastar P-Series Phone System reinvents how business connects by converging calling, meeting, omnichannel messaging, integrations, and more in one simple solution, breaking down the boundaries of distance, platforms, and systems.

  • The easiest phone system you’ll ever set up and manage
  • Full unified communications, anywhere, any device
  • Flexible cloud and on-premises deployment options
  • Powerful 3rd-party platforms & tools integration
  • Interoperable with IP phones & SIP trunks of your choice

Call, Meet, Chat, from Anywhere

With our user-friendly Linkus UC Clients, get a world-class phone system inside a single app, from virtually any device.

All office extension features

  • Handle calls, chat with teams, audio/video conference, check colleagues’ presence, listen to call recordings, check voicemails, see call logs, and more, in one simple app.

All contacts in one place

  • With PBX-native contact management, intuitive phonebooks, and cross-system contacts synchronization, manage all your contacts in one place.

Easily switch devices

  • Use the app on your web, mobile, or desktop and filp calls seamlessly between devices in one tap. All data are in sync.

Enhanced Customer Experience

Empower your teams to deliver exceptional customer services across multiple channels with rich contact center features.

Enable productive call center

  • Automatic call distribution, queues, wallboard, agent coaching, call recording, queue callbacks, reports, and more advanced call center features.

Add SMS & WhatsApp messaging

  • Connect your SMS trunks and WhatsApp accounts to send, receive, and manage all your business messages in one simple interface.

Convert visitors to leads

  • Let your visitors call you for free with just a click from your website or on your own applications. The setup is easy with the PBX’s inbuilt WebRTC and SDK features.

Know who’s in touch

  • Rich CRM and helpdesk integrations to quickly identify who’s calling or as messages come in, sync customer interaction records, and more.

Outstanding Features and Flexible Plans

Go at your own speed with flexible deployment options and industry-leading feature set.

Standard PlanEnterprise PlanUltimate 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 Drive

SNMP Support


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 ChatCall Center

1:1 or Group Chat with Colleagues

File & Image Sharing

Push Notification

Sync Across Linkus UC Clients

Remote Access Service

Custom PBX Domain Name (FQDN)

Remote & Secure PBX Web Portal Access

Linkus UC Clients Remote Connection

LDAP Server Remote Access

Remote SIP Service

Hassle-free Remote SIP Registration

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)


PBX Configuration APIs

Call Control APIs

uaCSTA Control APIs

Event Notification APIs

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

Rich, Programmable Code Samples and UI

Secure Authentication with Tokens

Faster and standarized development

Disaster Recovery

Cross-region Active-standby Redundancy

Automatic Failure Detection & Fallback

Real-time Data Replication

Secure SD-WAN or VPN Remote Networking

Hotel PMS IntegrationOptional

Room Status Synchronization

Wake-up Call Scheduling

Call Accounting & Minibar Charging

Guest Information and Room Move