A300 flight crew reported receiving an AVIONICS SMOKE RED ECAM warning accompanied with an aural alert. The flight crew donned oxygen masks and continued to land.

Narrative

Just inside the final approach fix for the ILS XXR; we received a AVIONICS SMOKE red ECAM warning accompanied with an aural alert. We did not immediately smell or see any smoke; however we decided to don oxygen masks anyway and continue to land. Our reasoning was that the final step in the ECAM procedure was to land ASAP anyway and we could follow the procedure on the ground. While I was donning the oxygen mask; the cord became tangled in my headset cord and the microphone wire from the mask must have detached from the its connection to the jet. While I was attempting to reestablish comms; we missed several calls from Tower. After I had my comms restored; the first transmission I heard was Tower cancelling our landing clearance. I requested priority handling with Tower and stated that we had a smoke warning. Tower cleared us to land. We landed and cleared the runway uneventfully. Upon landing the ECAM warning disappeared. After clearing we stopped on Taxiway Y and ran the sniffer and looked for smoke; but could not smell or see any smoke. We provided additional information (personnel on board; fuel; haze) to the ground controller. Because we did not detect any smoke and the ECAM warning was no longer present; we elected to taxi to parking. We parked and shut down uneventfully. Red AVIONICS SMOKE ECAM alert/unplugged oxygen mask comm cord. Put a latching mechanism on the comm cord. It tested good during the preflight check; but when it snagged; the press-fit connection came apart.