6.1.11. Selection Group Operating States 
One condition considered when deciding whether the selection table
of a selection group checks a CDR record that is entered in memory is
the current operating state of the respective selection group, among
other conditions. This is why the corresponding state parameters are
allocated to each selection group. They can be changed by administration
and maintenance orders (AMO SELS).
This makes it possible to activate and deactivate call charge recording
and CDR displays indirectly by means of the output of a selection group
without device intervention (at times).
Operating states of selection groups (see also AMO SELS):
- State 'ON'
The selection group is activated. Output should be performed with the allocated selection tables of the selection group. If a processed CDR record is to be output, it is linked into the output queue of the selection group and thereby released for output.
- State 'OFF WITH QUE'
The selection group is conditionally activated. The CDR record is processed and linked in the output queue as in the state "ON". However, the output is blocked until the selection group is reset to the operating state "ON" or "OFF WITHOUT QUE". All CDR records that, in case of output, are already linked to the output queue at this time or that will be entered in this operating state in the future, are put in safekeeping for output for as long as the memory capacity of the overflow memory or the group's individual memory is not reached. If the memory capacity is reached, output starts on the reserve device.In this operating state, maintenance work can be done on the allocated basic output device without any loss of the output data of this selection group.
- State "OFF WITHOUT QUE"
The selection group is conditionally deactivated. In this operating state, no processing is done to a CDR record in the selection tables of this selection group, so there is no output. However, all CDR records that are already linked in the output queue at the time of the removal from service are still output. For block output, this can result in the formation of a partial block.
- State 'OFF'
The selection group is deactivated. In this operating state, there is no processing of CDR records in the selection tables of this selection group. All CDR records that are linked in the queue at the time of the removal from service are deleted.