The Viking E-10A is a telephone line powered entry phone designed to provide two-way handsfree communication. It function identically, when the "Call" button is pressed, the E-10A will come off-hook and will remain off-hook until a CPC signal is detected, the programmed timeout has elapsed, a busy signal is detected, or the call goes silent, making the unit automatically disconnect.
The E-10A can be connected directly to a C.O. line or analog PABX/KSU station when programmed as a ringdown circuit. One to four E-10A speaker phone can share an existing phone line in a house or small business when used with a Viking C- 200, C-250 or C-2000B Entry Phone Controller.