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Performance Measurements
Issue 5 January 1998
14-11555-230-024
— System Management includes the number of successful and
unsuccessful logins, the number of valid and invalid passwords,
and the number of times a login name was valid but three
successive invalid passwords were entered.
— Call Processing lists the number of valid and invalid barrier codes
entered, and the number of valid and invalid authorization codes
entered for the total system, the stations on the system, all tie
trunks, all remote access trunks, and the attendant consoles. In
addition, the time and dial access code/extension from which the
last ten violations occurred are recorded.
— Maintenance Board lists the number of valid and invalid attempts to
access the maintenance board.
■ Tandem Traffic report, which provides information on facilities that serve
tandem traffic.
The following measurements are useful in helping you evaluate the network engi-
neering design for possible reconfiguration. They can help you decide how to
reconfigure networks for lower-cost operation.
■ Hunt Group Measurements lists various information including the number
of calls that overflowed the group queue.
■ Automatic Route Selection Pattern Measurements collects information on
Automatic Route Selection patterns from when the report was
administered into the measured pattern list until it is removed from the
measured pattern list.
■ Trunk Group Detailed Measurements reports on the traffic on a selected
subset of trunk groups for a sequence of 24 measurement intervals whose
length is customer-selectable between the options of 15 minutes, 30
minutes, and one hour. The report is divided into two sections:
— Group Identification includes the trunk group number, size, type,
direction, and size.
— Measurements lists total usage, maintenance usage, total calls,
incoming calls, tandem calls, group overflow, calls queued, queue
overflow, percentage of all trunks busy, and percentage of outgoing
blocking.
The following measurements and reports are needed for engineering and load
balancing a large switch. These measurements include:
■ Blockage Study report, which shows the blockages that occur for Time
Division Multiplexing attempts and for Center Stage Switch connections
for each port network and the blockages that occur between each pair of
switch nodes.
■ Port Network and Link Usage is used in balancing load between port
networks and in engineering links (Expansion Port Network/Switch Node),
especially remote Expansion Port Networks over Digital Signal Level 1