Yeastar Linkus Mobile Client
Utilities
Only for iPhone
Free
Linkus is a VoIP Mobile Client coordinated with Yeastar PBXs that makes your iOS mobile phone an office extension and links you and your colleagues and customers anywhere anytime. Make and receive calls through corporate phone network to slash call costs and enhance efficiency with consistent in-office experience.
Key Capabilities
- Make and receive enterprise VoIP calls over your Wi-Fi or mobile data networks to lower mobile voice charges
- One number reach to conceal your personal mobile phone number and ensure unified corporate identity
- Set up flexible ring strategy for Linkus and the desktop phone
- Select different outbound routes for different destinations (local/long-distance/international, etc.)
- Corporate directory integration with lookup and visual status indicator (available/unavailable/busy)
- Configurable PBX features including Call Transfer, Call Forwarding, Call Waiting, DND, and Ring Timeout
- Support Push Notifications to alert users of incoming calls while conserving energy
Main Features
Call Forwarding
Call History
Call Route Selection
Call Transfer
Call Waiting
Contact Management
Corporate Directory
Do Not Disturb
Extension Status
Hold & Resume
Native Contacts Integration
One Touch Recording
Outbound Route Selection
PUSH Notification
Ring Strategy Selection
Speed Dial/Favorite
Voicemail
Specifications
iOS Requirement: iOS 11.0 or higher
Network: 2G/3G/4G or Wi-Fi
Protocol: SIP FRC2361
Codec: iLBC/u-law/a-law/G722/G729
Network Protocol: TCP/IP/UDP, RTP/SRTP/RTCP, HTTP/HTTPS
DTMF: Inband, RFC4733 (RFC2833), Info
Important:
This application is integrated with Yeastar PBXs; your administrator must provide you with identity information for you to start using.
more It is a very nice & convenient Proprietary app to connect with Yeastar PBX over other 3rd party apps like Zoiper. Features like PBX contacts with BLF, easy create & connect Audio Conference are blasting. Still need further development like Video call & conference support, changing the server address without logging out, mostly need accounts section like Zoiper, 3CX etc for adding multiple accounts at a time. These added features will make it most professional app for connecting Yeastar PBX.Currently draining battery too much on forced background run, need to recover the issue ASAP.
It is a very nice & convenient Proprietary app to connect with Yeastar PBX over other 3rd party apps like Zoiper. Features like PBX contacts with BLF, easy create & connect Audio Conference are blasting. Still need further development like Video call & conference support, changing the server address without logging out, mostly need accounts section like Zoiper, 3CX etc for adding multiple accounts at a time. These added features will make it most professional app for connecting Yeastar PBX.Currently draining battery too much on forced background run, need to recover the issue ASAP.
This mobile app is much more advanced and stable than your typical VoIP application.
This mobile app is much more advanced and stable than your typical VoIP application.
We used this app extensively and is far above all the oters we’ve tried
We used this app extensively and is far above all the oters we’ve tried
It's quick to connect with local or external sever, now I can call with my colleagues freely anytime and anywhere, really surprises me!
It's quick to connect with local or external sever, now I can call with my colleagues freely anytime and anywhere, really surprises me!
1. Added compatibility with AI Receptionist feature:
- When receiving an AI receptionist-transferred call, the incoming call window displays a From AI Receptionist tag.
- After answering the call, the call window shows the AI receptionist-generated call transcript and summary, as well as collected customer information.
Note:
- The information is visible only to the first person who answers the transferred call. It is no longer displayed after the call becomes a multi‑party call or is transferred again.
- Whether customer information is displayed depends on the AI Receptionist configuration on the PBX.
2. Optimized External Chat feature: For a WhatsApp session, if no matching number is found among existing contacts, Linkus uses the recipient's WhatsApp profile name as the session name.
Note: The session name updates only when the recipient replies to your message.
5.26.15 May 25
1. Added compatibility with the following system-level configurations.
- Added support for logging in to Linkus client using your extension number when connecting to a P-Series Cloud PBX, depending on the allowed login method configured by the system administrator.
- When you receive a call forwarded from another extension, the original extension's name and number may be displayed on the call screen based on the Caller ID display strategy configured by the system administrator.
- When you create a session on an SMS or WhatsApp channel, but another session with the same sender and receiver already exists on the channel, a prompt may appear based on the system administrator's messaging channel settings. If you continue, you will take over the session from the original handler, along with the complete chat history.
2. Added support for setting Linkus client as the default calling app on devices running iOS 18.2 or later. Once set, you can tap a phone number recognized by your mobile device and select Call to initiate the call directly via the Linkus client.
3. Optimized Voicemail feature:
- Added support for forwarding voicemails to specified extensions.
- When you dial feature code to play a voicemail forwarded from another extension, the Linkus client will play a voice prompt that includes the number of the extension from which the voicemail was forwarded.
4. Optimized Chat feature:
- If a text message is recognized as a phone number, tapping the number will show two call options (Linkus and Dial through Mobile). You can select Linkus to make a call via the Linkus client using your extension number, or select Dial through Mobile to make a call using the mobile's default calling app.
- If a text message is recognized as a link, tapping the link will automatically redirect to the corresponding web page in Linkus client.
5. Optimized incoming call display policy: When Focus Mode is enabled on your iOS device, Linkus incoming calls will appear as silent notifications in the Notification Center to notify you.
5.25.15 Apr 24
1. Added compatibility with the following system-level configurations.
- If system administrator has set Linkus Mobile Client Concurrent Registrations to a value greater than 1 for your extension, you can log in to multiple Linkus Mobile Clients simultaneously.
- If the system administrator has configured a remark for a speed dial number on the PBX server, when you dial the speed dial number using feature code, the remark will display below the phone number on the call screen.
2. Added support for managing all Linkus UC Clients logged into your extension.
3. Fixed the call log issue: Linkus did not display call logs when connected to S-Series PBXs.
5.24.14 Apr 2
1. Added compatibility with the following system-level configurations.
- If system administrator has set Linkus Mobile Client Concurrent Registrations to a value greater than 1 for your extension, you can log in to multiple Linkus Mobile Clients simultaneously.
- If the system administrator has configured a remark for a speed dial number on the PBX server, when you dial the speed dial number using feature code, the remark will display below the phone number on the call screen.
2. Added support for managing all Linkus UC Clients logged into your extension.
5.24.13 Mar 30
Optimized user experience.
5.23.7 Feb 5
Fixed the call issue: When users logged in to Linkus with a domain name that did not end in `.com`, all outgoing calls would fail.
5.22.19 Jan 23
1. Added compatibility with iOS 26.
2. Fixed the following call issues:
- Outgoing calls failed when the mobile phone is switched from a Wi-Fi to a 5G cellular network.
- When dialing a ring group number, the call was incorrectly placed to an external contact whose number contained the dialed digits.
5.22.15 Jan 13
1. Added support for Svenska (Swedish) interface language.
2. Added support for directly parking calls via a button.
During an active call, you can tap the Park button from the call screen to park the call on a system-assigned or manually selected parking number.
3. Added compatibility with the following system level configurations:
- Caller ID name display rules: Depending on the rules configured on the PBX, Linkus client may display the matched local contact name, the name carried in the From header of the SIP message provided by the PBX, or both.
- Login restriction: If system administrator has integrated the PBX server with Microsoft Azure Active Directory, Active Directory or Google Workspace, and configured SSO-only login, you will be required to log in exclusively through the integrated identity provider's account.
5.21.3 12/03/2025
1. Optimized contacts searching: Added support for fuzzy matching by ignoring symbols and letters, and directly matching phone numbers.
2. Fixed the call issue: When making an outbound call, the callee's name and number were not displayed correctly on the calling screen.
5.20.3 11/10/2025
1. Optimized Set Temporary Status feature: Added support for setting a specific date and time for your temporary status to end. Once the specified time is reached, your temporary status will automatically switch back to the original status.
2. Optimized the login method: When logging in to Linkus with Microsoft account via SSO, you need to enter the PBX server address first, then click the Microsoft icon to login.
5.19.7 10/13/2025
Added support for AI-powered Call Transcription, which can transcribe active calls into readable text and generate a summary after the call ends.
Note
To use this feature, the following requirements should be met:
The version of PBX server is 37.20.0.x or later.
The system administrator has enabled Call Transcription for your extension.
5.18.15 09/19/2025
Added support for AI-powered Call Transcription, which can transcribe active calls into readable text and generate a summary after the call ends.
Note
To use this feature, the following requirements should be met:
The version of PBX server is 37.20.0.x or later.
The system administrator has enabled Call Transcription for your extension.
5.18.12 09/17/2025
Fixed the call issue: When a user logged in to Linkus Mobile Client (with ICE enabled) over an IPv6 network, the incoming call window would crash upon receiving a call.
5.17.10 08/13/2025
Added support for configuring distinctive ringtones for incoming calls based on different call sources, making it easier to distinguish calls from colleagues, customers, or specific contacts.
5.17.8 08/05/2025
1. Added support for AI Voicemail Transcription, which can automatically convert your voicemail messages into readable text.
2. Added support for bulk deletion and one-click removal of all personal contacts.
3. Improved queue agent experience with the following enhancements:
- Added support for logging in to the last queue.
- Added compatibility with the queue call handling strategy configured at the system level: For missed or abandoned calls from the same caller and queue, changes made to the processing result will be automatically synchronized across Linkus UC Clients.
5.16.6 07/07/2025
Fixed the call issue: Linkus displayed "registering" upon receiving incoming calls and could not answer the calls when connected to S-Series PBXs.
5.15.9 06/16/2025
1. Added support for making and receiving calls with CarPlay.
2. Added compatibility with custom extension presence statuses configured at the system level.
3. Fixed the contacts issue: When there was only one company contact and it was deleted, adding a new contact would cause the deleted one to reappear.
4. Fixed the call issue: When the callee rejected an incoming call on Linkus, the caller was not properly disconnected and remained in the dialing state.
5.15.8 06/09/2025
1. Added support for logging in to Linkus using Google account.
Note: This feature is supported only when system administrator has integrated PBX with Google Workspace.
2. Added support for setting up Dark Mode or Light Mode manually for Linkus, independent of phone system settings.
3. Optimized Contacts feature:
- Added support for creating up to 3,000 personal contacts.
- Added support for viewing contacts' company names directly in the contact list.
4. Optimized Caller ID Name display in Call Logs, Voicemails, and Recordings: When a caller number doesn't match any extensions or contacts, its associated Caller ID Name will be displayed, if any.
5.14.3 05/08/2025
Note: To use the following new features, system administrator needs to upgrade PBX to new version.
1. Added support for Japanese interface language.
2. Added Call Notes feature, which allows you to take notes directly during calls, and to review or edit notes in the corresponding call logs after calls, helping you to capture important details for future reference.
Note: This feature is supported only when system administrator has enabled Call Notes feature.
2. Added an option Accept calls from Ring Group (Path: Account→Current Presence→More→Other Settings), which allows you to set whether to receive ring group calls under the specific presence.
3. Added support for managing your agent status in a specific call queue (Path: Account→Agent Status).
4. Optimized user presence synchronization: If system administrator has configured Microsoft Teams Presence Synchronization** for your extension, the extension's presence will be synchronized with your Microsoft Teams status, ensuring consistent status updates.
5. Optimized contacts searching: Added support for real-time searching of contacts within CRM/Helpdesk systems, and support fuzzy matching.
Note: This feature is available only when system administrator has integrated the PBX server with a CRM/Helpdesk system.
6. Optimized Codec feature (Path: Account→Settings→Audio Options→Codec): Added support for selecting multiple codecs and adjusting the order to improve call quality.
Note: This feature is only available when the PBX server is Yeastar P-Series Appliance Edition.
7. Optimized login security:
- When using email as the Two-Factor Authentication method to log in, the email address displayed on the login page will be partially masked.
- If system administrator has enabled User must change password periodically for your extension, you will be required to periodically change your password to continue using Linkus, ensuring account security.
8. Optimized login flexibility: Added support for using the same domain name to log in from both internal and external networks, regardless of your location.
Note: This feature is available only when the PBX server is Yeastar P-Series Appliance Edition or Yeastar P-Series Software Edition, and administrator has configured DNS on the PBX system.
5.13.6 03/26/2025
Optimized External Chat feature: When quickly creating an SMS session via contacts, call histories, etc., the Recipient will be auto-populated with the selected number if it contains the character +, eliminating the need to manually select country code for the recipient.
5.12.4 02/25/2025
1. Optimized contact search: Added support for searching contacts by remarks.
2. Optimized Internal Chat feature: Added support for sending, previewing, and downloading files within conversations.
3. Optimized Queue Call Logs feature:
- Added support for queue managers to check and delete missed queue call logs.
Note: To achieve this, contact system administrator to grant the necessary permission.
- Added support for queue agents to delete call logs for the queue calls they have answered.
5.10.3 01/13/2025
1. Added compatibility with Masked Number feature: If system administrator has enabled Masked Number feature, the external number displayed in the incoming call window and the associated call log will be masked.
2. Optimized user experience in Linkus calls: When you receive an inbound call, the caller's number will be displayed in the incoming call window.
3. Optimized contacts matching: When you receive an inbound call, the system will compare the caller's number with existing contacts based on the number matching rules set by system administrator.
5.9.3 12/19/2024
1. Added an option Auto Answer (Path: Account→Settings→Advanced→Auto Answer). If this option is enabled, non-paging/intercom calls will be automatically answered.
2. Optimized Auto Answer Paging/Intercom feature:
- Added an option Play Auto Answer Tone to alert you with a tone when a paging/intercom call is automatically answered.
- Added an option Paging/Intercom Calls Barge In to auto answer paging/intercom calls during an active call.
3. Optimized Outbound Caller ID (DOD) display: If you don't configure label for DOD number, the DOD name associated with the DOD number will be displayed.
4. Fixed the call issue: ICE negotiation failed, resulting in no audio during a call.
5.8.2 11/11/2024
1. Added support for synchronizing contacts from Microsoft SQL.
2. Optimized Presence Status display: Presence icon, presence name, and presence information are displayed to provide a more visual reference to your colleague and your current availability and status.
3. Optimized Internal Chat: For images and videos sent from Linkus, Chinese characters in the filenames will be removed when recipients download the files.
4. Optimized External Chat: When creating an SMS session, Sender and Recipient will auto-populate with default values.
- Sender: Auto-populate with the last selected sender number.
- Recipient: Add a Country/Region Code field and auto-populate with the last selected country/region code.
5.7.3 10/10/2024
1. Added support for centrally dealing with customer queries from Live Chat and Facebook.
2. Added support for changing outbound caller ID before making an outbound call.
You can choose to use a global outbound caller ID for all outbound calls, use a different outbound caller ID for each outbound call, or simply follow the settings configured by system administrator.
3. Added a configuration item Stop Push Notifications (Path: Account→Stop Push Notifications), which allows you to disable notifications for incoming calls, new messages, etc. when Linkus is killed.
4. Optimized user experience in Linkus calls: Added a status icon next to extension user's avatar to distinguish between extension ringing and extension answering.
5. Optimized user experience in Call Flip and Call Switch: When trying to move a live call between devices, a CTI icon will appear if the device is CTI-controlled.
6. Fixed the issue of External Chat: If logging in to Linkus by manually entering PBX's domain in the SN/Domain field, multimedia messages could not be downloaded.
5.6.6 08/28/2024
1. Added compatibility with AI Receptionist feature:
- When receiving an AI receptionist-transferred call, the incoming call window displays a From AI Receptionist tag.
- After answering the call, the call window shows the AI receptionist-generated call transcript and summary, as well as collected customer information.
Note:
- The information is visible only to the first person who answers the transferred call. It is no longer displayed after the call becomes a multi‑party call or is transferred again.
- Whether customer information is displayed depends on the AI Receptionist configuration on the PBX.
2. Optimized External Chat feature: For a WhatsApp session, if no matching number is found among existing contacts, Linkus uses the recipient's WhatsApp profile name as the session name.
Note: The session name updates only when the recipient replies to your message.
more Version 5.26.15 May 25
Data Not Linked to You The following data may be collected but it is not linked to your identity: