System Functions and Features as of I7.9
Features 501
syd-0200/3.0 – I7.9 – 11.2009
External Alarms on System Terminals
Receiving external alarms
An external alarm is signalled on the system terminal either by continuous ringing
or by a set ringing duration (0...3600 s) consisting of a cycle that alternates 4 s of
ringing with a 1 s pause. The alarm text is indicated on the display at the same time.
In this status the option to read, acknowledge, reject or delete the message is avail-
able.
Displaying an external alarm source
As long as the alarm has not been cleared, the Info key can be used to display the
source of the alarm together with the user number and user name.
Reading external alarms
The Read menu item stops the continuous ringing and the entire text message is
then displayed (press Info key if necessary). The alarm server obtains a message to
say that the alarm has been read.
Acknowledging or rejecting external alarms
Acknowledging or rejecting the message stops the continuous ringing, and the
alarm server is notified of the user’s response. The server can then send a confirma-
tion to the system terminal, whose display then reads Done. This tells the user that
his response has been processed by the alarm server.
Deleting external alarm
The alarm can be cleared at any time either by the external alarm source or manu-
ally by the user. The alarm server is notified accordingly if the alarm is cleared by
the user. If there is another alarm in the queue, it will be displayed once the previ-
ous alarm has been cleared.
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