What is the maximum usable length for a 1-Wire cable?

The maximum length of a 1-wire cable is dependent on several issues such as the type of cabling. Thirty meters is possible with modular phone cabling, but much longer distances can be achieved with better cable selection. For a complete treatment of the subject, see the Dallas Semiconductor Application Note 108 "MicroLAN - In the Long Run" found at http://www.dalsemi.com/datasheets/pdfs/app108.pdf.