cat5 bandwidth

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	Question by mohamed ESMAT posted 27 Jan 2002
	cat5 bandwidth
I have used cat5 cables to transmit TV signals, it was working efficiently. I tried to use it to transmit a GUESTLINK signal, this is a signal used to operate the TV as an interactive TV so that you can access the internet and so on, but it failed to transmit this signal. By the way this signal is transmitted at 127MHz. Do you have a solution for this issue? Thank you for your support.
	Answer by Dmitri Abaimov posted 30 Jan 2002
Dear Mohamed, I'm not familiar with GUESTLINK system, but I do believe that it uses non-balanced signal as oppose to un-balanced one that CAT5 cables are designed for. The other thing is: CATV signals are being transmitted in one direction only (downstream), so you don't have crosstalk at all. If you make it interactive, you have both up- and downstream, so you have to worry about NEXT (crosstalk). I would advise you to use balun (balanced-unbalanced) adapters for the signal. Take a look at Avaya's 384 series adapters. This should work. Sincerely, Dmitri Abaimov, RCDD
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