The shared lines feature is a telecommunications feature that allows multiple devices or users to share the same phone line. With this feature, calls made to a shared phone line will ring on all connected devices or phones, allowing any of the connected users to answer the call. This feature is often used in office settings, where multiple employees need to be able to answer calls to a single phone number.
Shared lines can be configured in different ways, depending on the specific needs of the users. For example, a shared line can be set up to ring simultaneously on all connected devices, or it can be set up to ring on one device at a time, with the other devices ringing only if the call is not answered on the first device. Some shared line setups also allow users to place calls on hold or transfer calls to other devices or users on the same line.