A gland in USB cable

[k_mohsen]

Hi
USB cable of some device like printer, scanner and etc has a gland in the end of the cable.
You can not see this part in USB cable of other device, like camera, mp3/4 player, external HDD/ODD, mouse, keyboard and....
What is the task of this part?

Thanks

[recovering disk space -- attachment deleted by admin]

[drmsucks]

The "gland" is a ferrite core introduced into the cable to reduce or eliminate RFI; in other words, to reduce the chance that interference from operation of the USB device will interfere with the operation of a nearby device.

[hiloed]

Technically it's called a RF Choke mad of ferrite or ferrite beads.
Look here for good explanation.
http://computer.howstuffworks.com/question352.htm

[Carbon Dudeoxide]

In other words, it is something to make people ask about it.

[BC_Programmer]

like how you have those families housing their elderly members, and they never seem to move- thus everybody that visits asks the question. "Is he dead?"

[patio]

Actually i like "gland"...never heard it called that before...