In-band signaling is a method of communication where control information is sent over the same channel as the data. This means that the signals used to manage the connection, such as establishing or terminating a call, are transmitted alongside the actual data being sent. This approach is commonly used in traditional telephone systems, where voice and signaling share the same frequency range. One advantage of in-band signaling is its simplicity, as it does not require separate channels for control and data. However, it can be less efficient and more prone to interference, especially in systems like Voice over IP (VoIP), where packet switching is used to transmit data.