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Section 61245002L6-5, Issue 3
61245002L6-5C
Performance Monitoring
The Performance History screen is shown in Figures 9
and 10. Type “H” to view the Performance History
screen for the HRE. See Figure 9 for the HRE
Performance Monitoring screen. Type “H” to select
the view number from the view location diagram
located at the lower left of the screen to see the
performance monitoring information collected at
every receiver location throughout the Low Voltage
HDSL system.
Once all performance monitoring locations have filled
up (after initial powerup), each successive
performance monitoring register update overrides the
oldest performance monitoring data. The current
performance monitoring registers are indicated by the
key at the center of the screen. Previous performance
monitoring registers are also indicated by the key at
the center of the screen. Each previous performance
monitoring register has a minus sign followed by a
number. A number “5” in the 24-hour register, for
example, represents 24-hour data from five 24-hour
periods ago. A number “2” in the 15-minute register
represents 15-minute data taken from two 15-minute
periods ago.
Loopback Options
The HDSL loopback screens are illustrated in Figure
12. Terminate or evoke loopbacks using these
screens. Refer to Appendix A for detailed HDSL
loopback information.
Control Port Provisioning
During a terminal session, type “5” from the Main
menu to view the Provisioning screen, illustrated in
Figure 13. This screen displays the current system
configuration and allows for changing this
configuration. Provisioning changes are only allowed
at the Litespan HTU-C and not at the HTU-R. The
HTU-R provisioning is set directly from the
provisioning information entered at the HTU-C. The
HTU-C stores its provisioning information in an
EEPROM so that it remembers the past provisioning
changes to determine its operating mode in the event
of power loss to the HTU-C.
Provisioning options 6 through 9 will not appear on
the HTU-R provisioning screen, and the alarm setting
provision on the HTU-R provisioning screen is
meaningless in a Litespan environment and should be
ignored.
DSX-1 in the HDSL screens actually refers to a virtual
DS1 channel provided by the time slot interchanger
unit (TSI) of the Litespan CBA to the Litespan
linecard (see DSC Litespan documentation for more
detail). The actual DSX-1 monitoring point is at the
T1 framer onboard the HTU-C linecard.
This monitoring point receives the DS1
cross-connected data recovered from the DS1 virtual
tributary presented to the linecard.
The asynchronous DS1 gate array on the HTU-C line
card is responsible for providing the DS1
cross-connected data that is recovered from the DS1
virtual tributary.
Provisioning options are summarized in Table B.
Each option may be changed to any one of the listed
settings.
Troubleshooting
The Troubleshooting screen, illustrated in Figure 14,
graphically depicts an HDSL circuit. The unit reviews
red, yellow, and blue alarm conditions in the circuit to
automatically predict where a fault is located. Once a
fault location is suspected, the corresponding portion
of the circuit on the screen is highlighted and a
message describing the failure will appear.
