What does "Prepend" do when configuring outbound calls?

The function of "Prepend" in the context of configuring outbound calls is to add digits to the start of the dialed number. This is particularly useful in scenarios where you may need to modify the number dialed by the user to comply with specific dialing patterns required by the telephony system or provider. For example, if a specific prefix needs to be added for outbound calls to route them correctly through a particular trunk, using "Prepend" allows this prefix to be automatically included without the caller needing to dial it manually every time.

Understanding this function is crucial for effective call routing and ensuring that calls are correctly processed by the telephony system. It streamlines the dialing process for users and helps in managing outbound call patterns efficiently.