Priority Disconnect (Based on FRL/TCM)

System Feature Network Feature
Definition	Priority Disconnect is a function that can be used for “control telephony” calls, which have been assigned a Call Service Information (CSI) class (Emergency, Priority or Routine class), in order to ensure that trunk congestion does not prevent essential “control calls” from succeeding. The function is automatic, if prerequisites are fulfilled.
Settings	The Priority Disconnect function must be activated by the administrator per system (AS parameter). FRL/TCM CoS must also be set, per user and/or route, or dedicated common abbreviated numbers, to give the calls a CSI class, i.e. a priority.
Procedure and function	The Priority Disconnect function must be activated by I/O administrator. An FRL (and thus a CSI) can be associated as a CoS to each extension and route, and also via specific common abbreviated numbers dialed by the caller, and is sent as a TCM in the private network. There are four call types; Emergency, Priority, Routine and Normal/Administrator (which has no CSI) call. To automatically disconnect a trunk call, the calling user must have an FRL/TCM (and CSI) value representing Emergency or Priority, and the disconnected call must have a lower or equal CSI value. Control calls with CSI class Emergency cannot be disconnected. Priority can disconnect another Priority call. Routine call can be disconnected by both Emergency and Priority. The disconnected call gets no warning or indication that the call will be released. The function is supported for ISDN, DPNSS, H.323, SIP and certain MFC (TL22, TL37) tie-lines.

System Feature Network Feature

Definition

Priority Disconnect is a function that can be used for “control telephony” calls, which have been assigned a Call Service Information (CSI) class (Emergency, Priority or Routine class), in order to ensure that trunk congestion does not prevent essential “control calls” from succeeding. The function is automatic, if prerequisites are fulfilled.

Settings

The Priority Disconnect function must be activated by the administrator per system (AS parameter). FRL/TCM CoS must also be set, per user and/or route, or dedicated common abbreviated numbers, to give the calls a CSI class, i.e. a priority.

Procedure and function

The Priority Disconnect function must be activated by I/O administrator. An FRL (and thus a CSI) can be associated as a CoS to each extension and route, and also via specific common abbreviated numbers dialed by the caller, and is sent as a TCM in the private network. There are four call types; Emergency, Priority, Routine and Normal/Administrator (which has no CSI) call.

To automatically disconnect a trunk call, the calling user must have an FRL/TCM (and CSI) value representing Emergency or Priority, and the disconnected call must have a lower or equal CSI value. Control calls with CSI class Emergency cannot be disconnected. Priority can disconnect another Priority call. Routine call can be disconnected by both Emergency and Priority.

The disconnected call gets no warning or indication that the call will be released.

The function is supported for ISDN, DPNSS, H.323, SIP and certain MFC (TL22, TL37) tie-lines.

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