The design of the TI-101 limits its dependable use to standard central office lines. Installing an analog adapter or analog circuit card in the system might be a solution. It is your only choice if the telephone system digitizes the audio. Using this mode of operation, install the hybrid and a single line telephone on the analog extension. Answer incoming calls on the regular system and transfer them to the analog extension.

To assure that you get the right equipment, tell your phone installer that you want a fax machine on that extension. If a fax machine will operate on a line, a telephone hybrid will also. Your phone installer will not understand what you need if you talk to him about a “phone hybrid”. He will understand the requirements for a fax machine.