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OPERATION
Equivalent
Status Line
Front Panel
Indicator Name
LT
ST
RT
LOR
DS0LB *
* In Unframed Mode, this status line indicator is not shown (it is removed from the status line) or this front panel LED is not
used (it remains OFF).
Note: The normal status is indicated by a period (.), while an abnormal condition is indicated by an X.
The DS1
Diagnostics Menu
3-12
TABLE 3-1. STATUS LINE INDICATORS (Cont.)
Name
TM
Local Test — indicates whether the LT pushbutton is engaged (X) or disengaged (.).
TM
Self-Test — indicates whether the ST pushbutton is engaged (X) or disengaged (.).
Also indicates whether DS0 Self Test or DS0 Loopback (at the local CSU) is (X) or is
not (.) active.
TM
Remote Test — indicates whether the RT pushbutton is engaged (X) or disengaged
(.).
n/a
Local Option Override — indicates whether Local Option Override is disabled (.) or
enabled (X).
n/a
DS0 Loopback — indicates whether DS0 Loopback (at the local CSU) is (X) or is not
(.) active. (In Unframed Mode, the entire bandwidth is used for customer payload, so
the signal is not channelized, DS0s do not exist, and channel-level (DS0)
diagnostics do not apply.)
The Supervisory terminal can be used to monitor T1 link Performance
Reports provided by the Central Office, display alarm counts, and per-
form diagnostics such as loopback tests. Figure 3-7 illustrates the screens
and functions available through the DS1 DIAGNOSTICS menu.
To keep track of and analyze network performance, the network needs
error information based on intervals of 15 minutes, one hour and 24
hours, with a resolution generally of one second. For the purposes of gen-
erating reports for the network, time begins when the CSU is powered up
or reset, so the times you see displayed have little or nothing to do with the
actual time of day. Most errors are logged over 15-minute intervals (there
are four 15-minute intervals per hour and 96 15-minute intervals per 24
hour period). As time progresses, the errors for one interval become the
errors for the next interval and are no longer updated: only the current
interval is ever updated.
The CSU stores error information in two independent register (memory)
sets: the network register set and the user register set. The network regis-
ter set is provided for the Central Office to retrieve and clear. The user
register set is what you see displayed in the various diagnostics screens,
but it is not affected when the Central Office clears the network register
set. Therefore, the two register sets will not contain the same error in-
formation after the Central Office clears the network register set.
In Unframed Mode, the One Hour Report, Twenty-
Four Hour Report and Scheduled Performance Report
Description
Pushbutton Switches
Other Indicators
NOTE
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