Definition u. Verwendung im Englischen:

1) http://stele.adc.com/Library/Literature/Multimedia/SQDS_Perf...

"Terminal isolation 18 dB minimum: Prevents unwanted interaction between
subscriber terminal equipment."


2) http://www.acterna.com/downloads/articles/application_notes/...

"Terminal Isolation [76.605(a)(9)]
Terminal isolation shall be at least 18 dB. In reality, it’s usually
much better than this. Depending on the source of the purchase!
I wouldn’t want the high cable modem output or harmonics to
"bleed" over into the TV or vice-versa."

Verwendung im Deutschen s. Referenzen.