Network-wide "emergency override/disconnect" is used primarily in special-purpose networks, e.g. power supply or police networks, for authorized users in emergency situations. "Destination-dependent disconnect" takes place on connection setup to a specific destination by means of code dialing.

The "emergency override/disconnect" feature enables the caller to intrude on or disconnect busy digital (S0/S2 B-channels) or analog lines (with/without DIUC, not TMOM circuits) within a private network configuration. In addition, "emergency override/disconnect" is also possible for analog or digital tie-trunks or CO (exchange) trunks within a private network (for breakout to other networks).

Emergency override can be activated by authorized users by means of suffix dialing as soon as the busy or ATB state occurs.

Disconnect can be activated by authorized users by means of prefix dialing as a precautionary measure prior to entering the destination number or alternatively by means of suffix dialing as soon as the busy or ATB state arises.

Users without special classmarks can initiate destination-dependent disconnect to specific internal or external emergency destinations by dialing a special code, e.g. an emergency call number. This code implicitly contains both the disconnect request and the destination address. The connection to this destination is then set up with a precautionary disconnect request. If the code for destination-dependent disconnect refers to an internal destination, translation to a station number with PEN takes place. The code is assigned to the station number by means of an AMO.

The emergency override/disconnect features can be activated by DIGITEs and Attendant Consoles.

The emergency disconnect feature can be activated from ANATEs.