Video over twisted-pair

Feb. 1, 1997
Q: I have been hearing more and more about video over twisted-pair cable. Most of the information I can find has been on specific active equipment that converts the video signals to frequencies that can be transmitted over Category 5 cabling. Have there been any discussions by any committee of the Institute of Electrical and Electronics Engineers (ieee) or other standards body on a standard for video over twisted-pair?

Q: I have been hearing more and more about video over twisted-pair cable. Most of the information I can find has been on specific active equipment that converts the video signals to frequencies that can be transmitted over Category 5 cabling. Have there been any discussions by any committee of the Institute of Electrical and Electronics Engineers (ieee) or other standards body on a standard for video over twisted-pair?

Todd Harpel, rcdd

Hubbell Premise Wiring

Stonington, CT

A: Various passive balun products are available that allow baseband and broadband transmission of video signals over UTP. However, I am not aware of any standards activity to allow transmission of video signals over twisted-pair cable without active equipment.

Both ieee and Asynchronous Transfer Mode (ATM) specifications accommodate the digital transmission of video signals over twisted-pair cable without directly specifying the application. In addition, there are specifications (standard formats) for the analog transmission of video signals--both baseband and broadband--that can be implemented on twisted-pair.

For a good tutorial on transmitting video over UTP, see "Transmitting video over structured cabling systems," August 1995, page 51.

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