As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY INTERPHONE DOES NOT LIGHT UP ON DIGITAL AUDIO PANEL WHEN CALLED FROM CABIN AND WILL NOT CONNECT WHEN EMERGENCY BUTTON IS PRESSED ON DIGITAL AUDIO PANEL. MAINTENANCE REMOVED AND REPLACED NETWORK INTERFACE MODULE PER EMB AMM, OPS CHECK GOOD.