This test verifies the wiring and operation of the signaling link between the switch and a endpoint or adjunct on a BRI interface. This test is not executed from the administration terminal, but rather is executed by using a BRI test set equipped with a display. The test set may replace the BRI set, ASAI or Avaya adjunct under test by plugging it into the same jack or by bridging it onto the wiring at some point between the switch and the endpoint or adjunct, thereby creating a pseudo-BRI multipoint configuration.