As of V15.5, Update 6 custom logos can be uploaded to supported IP phones. This feature is only supported for Enterprise edition license keys.
Supported phones
Yealink
Phone model
Format
Resolution
File size
Yealink T42G/T42S/T41P/T41S/CP860/CP920
.dob
192*64 2 grayscale
Yealink T27P/T27G
.dob
240*120 2 grayscale
Yealink T40G/T40P/T23G/T23P/T21(P) E2/ T19(P) E2
.dob
132*64 2 grayscale
Yealink T52S/EXP50
.png
320*240 <=4.2 MPix
<=5MB
Yealink T54S
.png
400*272 <=4.2 MPix
<=5MB
Yealink T48S/T48G
.png
800*480 <=2 MPix
<=5MB
Yealink T46G/T46S/T29G
.png
400*272 <=1.8 MPix
<=5MB
Yealink T56/T58/CP960
.png
800*480 <=2 MPix
<=5MB
The DOB file creation tool can be downloaded from here
Note: The Yealink phones support multiple logos, you want to only use the custom logo, the phone needs to be reset and re-provisioned using the custom logo.
Snom
Phone model
Format
Resolution
File size
Snom 760/D765
.png
320*240
<=5MB
Snom D375/D385/D785
.png
480*272
<=5MB
Htek
Phone model
Format
Resolution
File size
Htek UC802
.png
128*40 black&white
<=5MB
Htek UC803
.png
128*64 black&white
<=5MB
Htek UC804/UC806
.png
128*96 black&white
<=5MB
Htek UC804T/UC804G/UC806T/UC806G
.png
480*320 black&white
<=5MB
Htek UC902
.png
132*64 black&white
<=5MB
Htek UC903/UC912/UC912E
.png
192*64 black&white
<=5MB
Htek UC923
.png
320*240
<=5MB
Htek UC926/UC926E
.png
480*272
<=5MB
Htek UC924/UC924E/UC840/UC842/UC860/UC862
.png
480*320
<=5MB
Grandstream
Phone model
Format
Resolution
File size
Grandstream GXP2130/GXP2135
.jpg
320*240
<=5MB
Grandstream GXP2140/GXP2160/GXP2170
.jpg
480*272
<=5MB
Fanvil
Phone model
Format
Resolution
File size
Fanvil X5S
.bmp
480*320 16bit / RGB565
<=300KB
Fanvil X6
.bmp
480*272 24bit / RGB888
<=380KB
Legacy phones:
Yealink – T2x, and T3 models
Phone model
Format
Resolution
File size
Yealink T19P/T21P/T22P/T26P
.dob
132*64 2 grayscale
<=100KB
Yealink T28P
.dob
236*82 2 grayscale
<=100KB
Yealink T32G
.png
400*240
<=5MB
Yealink T38G
.png
400*272
<=5MB
Yealink VP530
.png
960*480
<=5MB
The DOB file creation tool can be downloaded from here
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