A circuit test at any device which will tie the transmit data to the receive data in order to apply a signal and receive the data back for interpretation. Usually done at a customer device such as a CSU or a network device such as DS-O or DS-1 DACS port.
Test in which signals are sent and then directed back toward their source from some point along the communications path. Loopback tests are often used to test network interface usability.
a software or hardware test that alters the flow of data so that an electronic signal is returned to its sender
a type of diagnostic test in which data is returned to the sending device after passing through all, or a portion, of the network link
Test that sends signals then directs them back toward their source from some point along the communications path. Loopback tests are often used to test network interface usability.
Diagnostic test where characters that are sent to the modem are immediately sent back from the modem so the computer can compare the characters sent with the characters received.
A testing often found in the menus of videoconference systems. It creates a virtual connection with itself, and allows the user to see the video and hear the audio signals they are transmitting.