Introduction

At the end of this article, you will be able to change the logo/wallpaper on your Yealink handsets to suit your business needs. Depending on the handset's capabilities, the logo/wallpaper will be displayed as text, wallpaper or a screensaver.

Please note: Not all Yealink devices provide the ability to change logo/wallpaper settings.

Handset Image Specifications

Model	File Format	Maximum Resolution	Colour	Max File Size
CP860	.dob	192 x 64	2 Colour Grayscale
CP920	.dob	248 x 120	2 Colour Grayscale
CP960	.jpg/.png/.bmp	720 x 1280	16-bit depth colour	5MB
EXP50	.jpg/.png/.bmp	320 x 240	16-bit depth colour	5MB
T19P	.dob	132 x 64	2 Colour Grayscale
T19P E2	.dob	132 x 64	2 Colour Grayscale
T20P	Техт
T21P	.dob	132 x 64	2 Colour Grayscale
T21P E2	.dob	132 x 64	2 Colour Grayscale
T22P	.dob	132 x 64	2 Colour Grayscale	100KB
T23	.dob	132 x 64	2 Colour Grayscale
T23G	.dob	132 x 64	2 Colour Grayscale
T23P	.dob	132 x 64	2 Colour Grayscale
T26P	.dob	132 x 64	2 Colour Grayscale	100KB
T27G	.dob	240 x 120	2 Colour Grayscale
T28P	.dob	236 x 82	2 Colour Grayscale	100KB
T29	.jpg/.png/.bmp	480 x 272	16-bit depth colour	5MB
T29G	.jpg/.png/.bmp	480 x 272	16-bit depth colour	5MB
T30	.dob	192 x 64	2 Colour Grayscale
T30P	.dob	192 x 64	2 Colour Grayscale
T31	.dob	192 x 64	2 Colour Grayscale
T31G	.dob	192 x 64	2 Colour Grayscale
T31P	.dob	192 x 64	2 Colour Grayscale
T33	.jpg/.png/.bmp	480 x 272	16-bit depth colour	5MB
T40G	.dob	132 x 64	2 Colour Grayscale
T40P	.dob	132 x 64	2 Colour Grayscale
T41P	.dob	192 x 64	2 Colour Grayscale
T41S	.dob	192 x 64	2 Colour Grayscale
T42G	.dob	192 x 64	2 Colour Grayscale
T42S	.dob	192 x 64	2 Colour Grayscale
T42U	.dob	192 x 64	2 Colour Grayscale
T43U	.dob	360 x 160	2 Colour Grayscale
T46G	.jpg/.png/.bmp	480 x 272	16-bit depth colour	5MB
T46S	.jpg/.png/.bmp	480 x 272	16-bit depth colour	5MB
T48G	.jpg/.png/.bmp	800 x 480	16-bit depth colour	5MB
T48S	.jpg/.png/.bmp	800 x 480	16-bit depth colour	5MB
T49G	.jpg/.png/.bmp	1280 x 800	16-bit depth colour	5MB
T52S	.jpg/.png/.bmp	320 x 240	16-bit depth colour	5MB
T53	.dob	360 x 160	2 Colour Grayscale
T53W	.dob	360 x 160	2 Colour Grayscale
T54S	.jpg/.png/.bmp	480 x 272	16-bit depth colour	5MB
T54W	.jpg/.png/.bmp	480 x 272	16-bit depth colour	5MB
T56A	.jpg/.png/.bmp	1024 x 600	16-bit depth colour	5MB
T57W	.jpg/.png/.bmp	800 x 480	16-bit depth colour	5MB
T58A	.jpg/.png/.bmp	1024 x 600	16-bit depth colour	5MB
VP59	.jpg/.png/.bmp	1024 x 600	16-bit depth colour	5MB

Generating Logos

To generate the logo/wallpaper image, you will need appropriate editing software. There is a diverse range of open and closed-source programs available on the market to create and edit images. Closed-source options include Adobe Photoshop and Corel Draw. Alternatively, open-source options include Microsoft Paint or Paint.net. In the below example, paint.net will be used.

PNG Colour Logo

1. Create a new file using the resolution required by your handset.

2. When pasting your logo/wallpaper into the new file, ensure that the 'Keep Canvas Size' option is selected.

3. Arrange your logo/wallpaper image in the canvas created for optimal sizing.

4. Save the image in PNG format.

DOB Grayscale Logo

1. Create a new file using the resolution required by your handset.

2. When pasting your logo/wallpaper into the new file, ensure that the 'Keep Canvas Size' option is selected.

3. Arrange your logo/wallpaper image in the canvas created for optimal sizing.

4. Change the colour to Grayscale/Black and White by Selecting ‘Adjustments’ in the menu bar followed by ‘Black & White’.

5. Save the file as a BMP file type.

6. Download Logo/wallpaper Generator here or at the bottom of this page

7. Unzip the archive into a central location.

8. In the location where the archive was unzipped, discover and run 'PictureExDemo.exe'.

9. In the application window, select Add and locate the BMP image created above.

10. Once the logo/wallpaper is added, click on ‘Convert’.

Note: the application does not display messaging of working or completion of the conversion.

11. In the application location (where PictureExDemo.exe is located), locate folder 'adv'.

12. Open the folder to locate your logo/wallpaper DOB file.

Applying the Logo/wallpaper to Yealink Handsets

1. Input the Yealink device IP address in your web browser (you can see it by pressing OK when the phone is idle). Then, to log into the handset management interface use the account name: admin and password: admin if it has not been manually changed.

2. Select the 'Phone' tab, then 'Features' and locate the 'upload Logo/wallpaper' section. The below example is from the T28 interface.

3. Browse to where you saved your logo/wallpaper (PNG or DOB file as required by handset) and click ‘Open’, followed by ‘Confirm’ in the handset management interface.

4. The logo/wallpaper is now ready.

Using Auto Provisioning

To utilize auto-provisioning, you will need to upload your logo/wallpaper file to a location where the handset has access. This can be local or online. Then insert appropriate code for your handset model into Advanced CFG configuration.

Modern Devices

E.g. T29G / T31P / T46G / T46S / T48G / T48S / T48S / T52S / T54S / T54W / T57W

wallpaper_upload.url = [url]/file_name.extention

phone_setting.backgrounds = file_name.extention

Older Devices

E.g. T19P / T21P / T23G / T23P / T27G / T40G / T40P / T41P / T41S / T42G / T42S / T53 / T53

lcd_logo.url = [url]/file_name.dob

phone_setting.lcd_logo.mode = 2

To disable the logo/screen saver

phone_setting.lcd_logo.mode = 0

Why do some handsets use DOB format logo/wallpaper files instead of popular BMP, JPG or others?

IP phones only use logo/wallpaper files in DOB format, as the DOB format file has a high compression ratio (the size of the uncompressed file compared to that of the compressed file) allowing for use in compressed storage spaces. Tools for converting BMP format to DOB format are available.