Yealink UH38 Wired Headset User Manual
Package List
- UH38 dual headset (with built-in battery)/mono headset (without built-in battery)
- USB 2.0 Cable ( USB-A to USB-C/USB-C to USB-C, line length 1.2 meters )
- Carrying Case
- Quick Start Guide
We recommend that you use the included accessories, and other accessories may have compatibility issues that prevent them from working properly.
Headset Buttons
| No. | Button | Description |
| 1 | Bluetooth on/off Button and Mobile Talk | • Hold for 5 seconds while the headset is powered off to enter the Bluetooth pairing mode (the button flashes red and blue). Then, you can search and connect Yealink UH38 on the mobile phone. • Hold for 5 seconds to disable Bluetooth. • Control button of Bluetooth device call: press to answer, reject, or end a mobile call. |
| 2 | Mute/Unmute Button | Press to mute or unmute the microphone. |
| 3 | PC Talk Button | Control calls from devices connected to the headset via a USB cable: press to answer, reject, or end a PC/desk phone call. |
| 4 | Volume up Button Volume Down Button | Press to turn up/turn down the volume. |
| 5 | (Teams Edition) Teams Button | • Hold for 2 seconds to activate Cortana integrated in Teams (this requires Microsoft’s support). • Press to invoke the Teams client. |
| 6 | (UC Edition) Voice Assistant Button | Hold for 2 seconds to activate the voice assistant. |
Busylight Indicator:
Introduction of the busy light indicator on both sides of the headset:
| Indicator | Description |
| Red light flashes | Incoming call rings. |
| Solid red light | During a call. |
Mobile/PC Button Indicator
Mobile Button Indicator
| Indicator | Description |
| The green light is on for 2 seconds, and then the light goes out | Enable Bluetooth |
| The red and blue lights flash alternately for 500 ms/time | Bluetooth enters the pairing state |
| The red light is on for 2 seconds, and then the light goes out | Disable Bluetooth |
| The blue light is on for 2 seconds, and then the light goes out | Bluetooth pairing succeeded |
| Green light flashes | Received an incoming call |
| Solid green | During a call |
| The green light double flashes | Stay on the line |
PC Button Indicator
| Indicator | Description |
| Green light flashes | Received an incoming call |
| Solid green | During a call |
| The green light double flashes | Stay on the line |
| The green light flashes slowly during the upgrade | A headset is being upgraded (when the upgrade is complete, the light of the mobile button, mute button, and PC button flash simultaneously for 1 second, and then the light goes out) |
Teams/Voice Assistant Indicator
When the headset activates the voice assistant, the button backlight is always on. When the headset works with Teams Client, the button backlight is shown below:
| Indicator | Description |
| White light flashes slowly | Receive a missed call/voice message/meeting notification |
| White indicator light flashes slowly and becomes solid white light | Teams connected successfully |
| The white light flashes slowly and then the light goes out | Teams is not connected |
Connecting to PC/Yealink IP Phone via the USB Cable
Connect the headset to the PC/Yealink IP phone via the USB cable.
For the dual headset, you can charge the headset after connecting it to your PC/phone via the USB cable.
Connecting to Mobile Device via Bluetooth
You can connect the headset to your phone via the built-in Bluetooth to use as a Bluetooth headset.
Procedure
- The headset enters the Bluetooth pairing mode.
- Unpacking for the first time (Bluetooth has not been paired): Press and hold the Mobile button for 3 seconds to enable the Bluetooth, and the headset enters the Bluetooth pairing automatically.
- Bluetooth has been paired: Press and hold the Mobile button for 5 seconds to enable Bluetooth, and the headset enters the Bluetooth pairing automatically. The voice prompts “Bluetooth on, remaining talk time XX hours, pairing mode”, then the headset enters the Bluetooth pairing mode. The red and blue lights of the Mobile button will flash alternately (500ms/time) after 2 seconds of the green light of the headset.
- Enable Bluetooth on your mobile phone/IP phone/PC.
- You can search and select the Yealink UH38 from the list of Bluetooth devices to pair with UH38.
The voice prompt “Mobile one connected” means that the connection is successful.
Left or Right Wearing Style
Mono Headset
You can wear the headset on the left or right by flipping the microphone to the other side (300° limit).
Dual Headset
You need to distinguish the left and right of the microphone, and the rotation angle of the microphone is up to 150°.
Adjusting the Microphone
You can adjust the microphone to find the most comfortable fit. When using the headset, you can bend the microphone boom properly and bring it closer to your mouth for better sound pickup.
Clip the Microphone Cable on the Clothes
You can fix the microphone cable to your clothes with clothespins. The clothespin keeps the microphone cable in a convenient position when using your mobile phone away from your PC.
Status Check
You can manually check the remaining talk time and device connection of the headset.
Procedure
In the idle state, press and hold the Mobile button for 2 seconds.
Results
- Dual Headset: the voice prompts “Remaining talk time xx hours, XXX connected”.
- Mono Headset (without built-in battery): the voice prompts “XXX connected”.
Basic Call and Music
| Headset | Feature | Action |
|
(Control buttons for Bluetooth device call) |
Answer call | Press the Mobile button. Note: When receiving an incoming call, the Busylight LED flashes red quickly, and the Mobile button LED flashes green. During the call, the Busylight LED glows red and Mobile button LED glows green. |
| End call | Press the Mobile button. | |
| Reject call | Press the Mobile button twice. | |
| Redial | Press the Mobile button twice in the idle state. | |
|
Hold/resume call | Press and hold the Mobile button for 2 seconds. Note: When a call is placed on hold, the Mobile button LED flashes green. | |
| Play/Pause music | Press the Mobile button. | |
(Control buttons for USB device call) | Answer PC/IP phone call | Press the PC button. Note: When receiving an incoming call, the Busylight LED flashes red quickly, and the PC button LED flashes green. During the call, the Busylight LED glows red and PC button LED glows green. |
| End PC/IP phone call | Press the PC button. | |
| Reject PC/IP phone call | Press the PC button twice. | |
| Redial | Press the PC button twice in the idle state. | |
| Hold/resume call | Press and hold the PC button for 2 seconds. Note: When a call is placed on hold, the PC button LED flashes green. |
Headset | Feature | Action |
|
Adjust volume | Press the Volume Up/Volume Down button. Note: press and hold the Volume Up/Volume Down button to increase/ decrease the volume. |
| Manually turn on/off the headset Busylight indicator | Press the Volume Up/Volume Down button when not in a call. | |
|
|
Mute/un-mute microphone |
Press the Mute button. When a call is muted, the Mute button LED is always on. It only works when the boom is down. |
|
| (Teams version) Activate Cortana integrated in Teams | Press and hold the Teams button for 2 seconds. This requires Microsoft’s support. |
|
(Teams version) Invoke the Team client |
Press the Teams button. | |
|
|
(UC version) Activate voice assistant |
Press and hold the Voice Assistant button for 2 seconds. |
Mute Usage
You can mute the microphone by moving the boom up or unmute it by moving it down.
Start Mute detection feature: it will prompt “Muted” when you are speaking into the muted microphone. Otherwise, it will not prompt.
Multiple Calls
The headset can answer and handle multiple incoming calls at the same time
| Handle multiple calls | Description |
| 1.The headset is on a call via a USB cable (the PC button glows solid green and the busylight glows solid red), and you can answer a new call via the USB cable at this time: | |
| Answer the new call and hang up the current call | Press the PC button. |
| Reject the new call and continue the current call | Press the PC button twice. |
| Answer the new call and hold the current call | Press and hold the PC button for 2 seconds. |
| 2.The headset is on a call via a USB cable (the PC button glows solid green and the busylight glows solid red), and you can answer a new call via Bluetooth at this time: | |
| Reject the new Bluetooth call and continue the current USB cable call | Press the Mobile button twice. |
Answer the new Bluetooth call and hold the current USB cable call | Press and hold the Mobile button. |
| 3.The headset is on a call via Bluetooth (the Mobile button glows solid green and the busylight glows solid red), and you can answer a new call via Bluetooth at this time: | |
| Answer the new call and hang up the current call | Press the Mobile button. |
| Reject the new call and continue the current call | Press the Mobile button twice. |
| Answer the new call and hold the current call | Press and hold the Mobile button for 2 seconds. |
| 4.The headset is on a call via Bluetooth (the Mobile button glows solid green and the busylight glows solid red), and you can answer a new call via the USB cable at this time: | |
| Reject the new USB cable call and continue the current Bluetooth call | Press the PC button twice. |
| Answer the new call and hold the current Bluetooth call | Press and hold the PC button. |
5. Multiple calls switching | |
| Switch calls between USB cable calls and Bluetooth calls (ie, switch device calls) | Press the PC(or Mobile button). |
| Switch USB calls via the USB cable: (ie, multi-call switching in the same device) | Press and hold the PC button (or Mobile button). |
| Switch from a call on the current bluetooth device to a call on another bluetooth device | Press and hold the Mobile button for 2 seconds. |
| 6.Conference calls | |
| Merge the USB cable call and Bluetooth call into a conference call | Press and hold the PC button and the Mobile button for 2 seconds simultaneously. |
| Split the conference calls | During the conference calls: • Press and hold the PC button for 2 seconds to split the conference calls. At this time, the PC continues the call, and the mobile phone call stays on the line. • Press and hold the Mobile button to split the conference calls. At this time, the mobile phone continues the call, and the PC call stays on the line. |
Recovery Factory Setting
Procedure
Press and hold the mute button and the Teams/voice assistant key for 6 seconds until you hear the voice- “Factory reset. Bluetooth on, remaining talk time xx hours, pairing mode”. After all the button lights flash simultaneously, the mobile button indicator will flash red and blue alternately to enter the pairing mode. Results The list of paired devices will be cleared and all settings will be reset after the headset is restored.
Yealink USB Connect
Yealink USB Connect is a computer software designed to manage Yealink USB devices. With Yealink USB Connect, you can:
- Get an overview of connected Yealink USB devices
- Manage your Yealink USB devices
- Update your Yealink USB device to enhance its performance and features
- Give feedback on your Yealink USB device.
Firmware Update
Procedure
- Connect the headset to the USB port of a PC.
- Update the headset firmware via Yealink USB Connect.
- Check for updates
- Update Manually.
For more information on Yealink USB Connect, refer to the Yealink USB Device Manager Client User Guide.
REFERENCE LINK
