![Viking C-2000B Single-Line Door Phone Controller Viking C-2000B Single-Line Door Phone Controller](https://cdn11.bigcommerce.com/s-u3uxlvxq3h/images/stencil/400x400/products/4932/39894/C-2000B__24494.1612465963.png?c=1)
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Use your door phone on the same line as your single-line telephones with the Viking C-200 controller. Can also connect to a phone system's available line input. Compatible with the Viking E-series door phones and the K-1500-7.