For systems running in IP Office Essential Edition mode, the first two extension ports of control unit slot 1 are system phones which can be used for system administration. This requires the ports to support suitable Avaya digital phones: ETR Series (ETR 18D, ETR 34D), M-Series (M7310, M7310N, M7324, M7324N), T-Series (T7316E, T7316), 1400 Series (1408, 1416) or 9500 Series (9504 and 9508).

The process steps vary depending on the type of phone being used. For full details, refer to the IP Office Essential Edition Phone Based Administration manual.