Nortel DMS-100 Series Application Manual page 397

total incoming attempts
The total number of call attempts on the office incoming from trunks or
operator positions, from the point of view of the central controller (CC).
This is the sum of:
minus
For international offices, this expression is replaced by the measurement
OTS NINC (with NINC2).
total originating attempts
The total number of call attempts on the office originating from lines, from
the point of view of the central controller (CC). This is equal to
measurement OFZ NORIG (with its overflow register NORIG2) in most
offices and measurement OTS NORG (and NORG2) in international offices.
traffic operator position system (TOPS)
A call processing system made up of a number of operator positions. Each
operator position consists of a visual display unit (VDU), a controller, a
keyboard, and a headset.
unit time
The OM system slow-scan interval (100 seconds).
unit unavailability
The total amount of time that equipment of a certain type is out of order.
Expressed as total outage per working unit per unit time, unit unavailability
is equal to failure rate multiplied by the mean time to repair (MTTR).
working unit
A unit that is fully equipped and is not offline (installation busy).
DMS-100 Family Switch Performance Monitoring System Application Guide BASE09 and up
OFZ NIN (with NIN2)
TOPSTRAF TOPSNIN (with TOPSNIN2)
TOPSCAN in TOPS offices
List of terms 10-5