Clear-Com TWC-704 - Manual (Page 10)

T W C - 7 0 1 A N D T W C - 7 0 4 A D A P T O R S 1 - 4
Note: Only Clear-Com intercom stations equipped with a TW option should
be connected to the output of the TWC-701. If a station not equipped
with the “TW” option is connected to the TW intercom line, the studio
portion of channel A will be loaded down, reducing volume level and
changing sidetone characteristics on that channel. (However, if a
non-TW equipped station is accidentally connected to the TW line, no
damage will be caused to the TWC-701/TWC-704 or any system
component.)