Before revision: The maximum frequency suitable for transmission over Cat 1 cable is 1 MHz,Meyers; Page 69. but Cat 1 is not currently considered adequate for data transmission (Though it was at one time used for that purpose at on the Apple Macintosh starting in the late 80's in the form a PhoneNet, an implementation of Apple's LocalTalk networking hardware standard.
After revision: The mFarallon Computing's//NetTopia'sximum frequency suitable for transmission over Cat 1 cable is 1 MHz,Meyers; Page 69. but Cat 1 is not currently considered adequate for data transmission (Though it was at one time used for that purpose at on the Apple Macintosh starting in the late 80's in the form a PhoneNet, an implementation of Apple's LocalTalk networking hardware standard.