What is one operation to check after adding a new modular telephone jack?

After adding a new modular telephone jack, checking inbound call capability is important as it verifies that the new installation is functioning properly and allows calls to be received. This checks the essential functionality of the jack; if it's not capable of receiving calls, it could indicate a problem with the wiring or installation process.

While outbound call capability is also important, ensuring that the jack can receive calls confirms that the basic connections and electrical signals are properly established. This is crucial for functionality since any issues here would prevent users from being reached at that number. Visual inspection of connections is valuable for identifying obvious physical problems, but without functional testing, you may not detect all issues. Similarly, a network speed test is not directly relevant to the functionality of a telephone jack, as it's more related to internet connections than telephone operations. Therefore, verifying inbound call capability ensures that the new jack is correctly set up for its primary purpose.