Overview: Linkus Desktop Client provides comprehensive calling and CTI (Computer Telephony Integration) functions in both Softphone mode and CTI mode. Manage calls directly from your computer with full control over all telephony features.
Desktop Client Operating Modes
Comparison: Softphone Mode vs. CTI Mode
| Operating Mode | Description | Usage |
|---|---|---|
| Softphone Mode | Complete software telephony via computer | When you don't use a desk phone |
| CTI Mode | Remote control of an external phone | When you prefer an IP phone or Web Client |
Softphone Mode Features
- Basic Functions: Make/end calls, answer/reject
- Advanced Functions: Hold/resume, mute/unmute
- Call Management: Transfer (blind/attended), recording
- Conference: Add participants, merge calls
- Mobility: Call flip between devices
Audio and Video Calls
System Requirements for Calls
| Call Type | Server Requirements | Codec Support |
|---|---|---|
| Audio Calls | • HTTPS Web Server Protocol • Any supported audio codec | u-law, a-law, G722 |
| Video Calls | • Ultimate Plan required • Video codec enabled | VP8, H264 |
Making Calls
- Enter Number
Use the dial field in the top toolbar or open the dialpad. - Select Call Type
Click on:- 🕻 Audio Call: For normal voice calls
- 📹 Video Call: For video calls (if supported)
- Choose Outbound Caller ID (optional)
Select a specific DOD number from the dropdown menu if needed. - Start Call
The call is established and you see the call interface.
Managing Incoming Calls
| Action | Description | Keyboard Shortcut |
|---|---|---|
| Answer Call | Accept incoming call | Ctrl+Shift+A |
| Reject Call | Decline incoming call | Ctrl+Shift+F |
| Forward to Voicemail | Send directly to voicemail | - |
Advanced Call Functions
Call Transfer
Two Types of Transfer: Blind (immediate) and attended (with consultation)
Blind Transfer
- Activate Transfer Function
Click "Transfer" → "Blind Transfer" during an active call. - Select Destination
Choose from contact list or enter number manually. - Complete Transfer
The call is immediately transferred to the destination.
Attended Transfer
- Activate Transfer Function
Click "Transfer" → "Attended Transfer". - Consult First
Speak with the destination first about the transfer. - Confirm Transfer
Click "Transfer" to complete the process.
Call Hold and Resume
| Function | Description | Maximum |
|---|---|---|
| Hold Call | Pause conversation without hanging up | Up to 6 held calls |
| Resume Call | Continue held call | - |
| Switch Between Calls | Toggle between held and active calls | - |
Audio Conferences
Limitation: Maximum 9 participants per audio conference.
Starting a Conference
- Invite Participants
Click "Add Participant" during a call. - Select Contact
Choose from contact list or enter a number. - Manage Conference
As host, you can mute or remove participants.
Conference Control (Host)
| Action | Host | Participant |
|---|---|---|
| Own Audio On/Off | ✓ | ✓ |
| Mute Others | ✓ | ✗ |
| Start Recording | ✓ | ✗ |
| Remove Participants | ✓ | ✗ |
| End Conference | ✓ | ✗ |
CTI Functions
Supported IP Phones for CTI
| Manufacturer | Compatibility | Supported Functions |
|---|---|---|
| Yealink IP Phones | Fully compatible | All CTI functions available |
| Fanvil IP Phones | Fully compatible | All CTI functions available |
| Snom IP Phones | Fully compatible | All CTI functions available |
| Grandstream IP Phones | Fully compatible | All CTI functions available |
| Other IP Phones | Limited compatibility | Basic functions available |
| Linkus Web Client | Fully compatible | All CTI functions available |
Activating CTI Mode
Prerequisite: uaCSTA feature must be enabled on the PBX server.
- Check Connected Device
Ensure your IP phone or Web Client is registered with the same extension. - Select CTI Mode
Click the CTI icon in the top toolbar and select the desired device. - Confirm Connection
The Desktop Client shows CTI status and you can control the external device.
CTI Functions by Device
| Function | Compatible IP Phones | Other IP Phones | Web Client |
|---|---|---|---|
| Make/End Call | ✓ | ✓ | ✓ |
| Make Second Call | ✓ | ✗ | ✓ |
| Answer Call | ✓ | ✗ | ✓ |
| Reject Call | ✓ | ✓ | ✓ |
| Mute/Unmute | ✗ | ✗ | ✗ |
| Blind Transfer | ✓ | ✓ | ✓ |
| Attended Transfer | ✓ | ✗ | ✓ |
| Record Call | ✓ | ✓ | ✓ |
| Call Flip | ✓ | ✗ | ✓ |
Call Flip and Mobility
Call Flip Between Devices
Prerequisite: Your extension must be registered on multiple devices.
- Start Call Flip
Click "Call Flip" during an active call. - Select Target Device
Choose the device you want to transfer the call to. - Answer Call on New Device
Accept the incoming call on the target device. - Seamless Transfer
The conversation continues without interruption.
Retrieve Call to Desktop Client
- Click "Call Switch" in the top bar
- Select the active call from another device
- The call is seamlessly transferred to the Desktop Client
Call Recording and Notes
Recording Calls
Permission Required: Your administrator must grant you permission to record calls.
- Click the recording icon during an active call
- Recording starts immediately
- An announcement may indicate recording is active (depending on configuration)
- Click again to stop recording
Adding Call Notes
Available from: PBX Server 84.18.0.102 and Linkus Desktop Client 1.11.7
- Open Notes Panel
Click "Call Notes" during a call. - Select Disposition Code
Choose an appropriate code from the dropdown list. - Add Remarks
Enter important information in the remarks field. - Save Notes
Click "Save" to store the notes.
🔧 Troubleshooting
Problem: No audio output during calls
- Check audio devices in settings
- Ensure microphone and speakers are correctly selected
- Test devices with other applications
- Check browser permissions for microphone access
Problem: CTI mode not working
- Check if uaCSTA is enabled on the server
- Ensure IP phone is registered with the same extension
- Check CTI settings on the IP phone
- Restart both Desktop Client and IP phone
Problem: Call flip not working
- Check if your extension is registered on multiple devices
- Ensure all devices are online
- Try a normal call between devices
- Contact your administrator for extension configuration
Problem: Video calls not possible
- Check if Ultimate Plan is activated
- Ensure video codecs (VP8/H264) are enabled
- Check camera permissions in browser
- Test camera in other applications
Problem: Conference functions not available
- Ensure you are in Desktop Client mode
- Check if you are the conference host
- Try with fewer participants (max. 9)
- Restart the client and try again
✅ Best Practices
Audio Quality
- Use a high-quality headset for best audio quality
- Ensure stable internet connection
- Close other audio applications during important calls
- Regularly test your audio devices
Call Management
- Use call notes for important conversation information
- Use meaningful disposition codes
- Record important calls (with consent)
- Use hold function instead of ending calls
CTI Usage
- Use CTI mode when you prefer a physical phone
- Configure your IP phone for optimal CTI control
- Use call flip for seamless mobility
- Keep IP phone firmware updated for best compatibility
Efficiency
- Learn keyboard shortcuts for frequent actions
- Use dialpad for quick number entry
- Use favorite contacts for frequent calls
- Configure function keys for one-click actions
Security and Compliance
- Inform call participants about recordings
- Follow local laws regarding call recording
- Use secure networks for calls
- Protect confidential conversations from eavesdropping
🎉 Excellent! You now master all calling and CTI functions of Linkus Desktop Client. Use the various modes and features for optimal communication in your daily work.
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