Specifications

Defining Operating Parameters
5-55
Table 5-16. Parameter Thresholds (Continued)
Parameter Default Settings
Signal Quality Good, 3 sec
Resync Limit 2 times, 5 min
Lost Communication Alarm Timer 60 sec
Regained Communication Alarm
Timer 600 sec
RTS Antistreaming Timer Disabled, 50 sec
DCD Antistreaming Timer Enabled, 50 sec
DTE Power Fail Timer Disabled, 10 sec
You can specify the amount of time the value of each line parameter can exceed its
defined threshold before the DAP issues an alarm. The possible settings are 3, 5, 10, 15,
20, 43, 60, and 80 seconds
The Excessive Resynchronizations parameter allows you to define the number of times,
from 1 to 16, a unit or circuit can be resynchronized before it is reported as an alarm
condition. You can specify the amount of time, from 5 minutes to 60 minutes in 5-
minute intervals, this condition can be active before the DAP issues an alarm. The alarm
is only generated once even when multiple units are being resynchronized. A RTN
(Return to Normal) function must be performed from the front panel before the alarm can
be regenerated. (See "RTN Function" in Chapter 7 for instructions.)
A Lost Communication alarm condition occurs when the central unit in a
multiport/multidrop circuit loses communication with one of the remote units. This
feature is only available when the service is set for DDSNI, the Location parameter is set
to central, the Network parameter is set to mulipoint, and the Automatic Poll parameter is
set to disabled. You can specify the amount of time, from 0 to 3900 seconds, this
condition can be active before the DAP issues an alarm. The time period selected should
be based on the number of units in the poll table since the number of polls to a given drop
decreases as the number of drops increases. For example, a setting of 30 seconds for up
to ten remote units in the poll table ensures that each unit receives three polls. The timer
becomes inactive when the lost unit regains synchronization at which time a Regained
Communication alarm condition occurs. You can specify the amount of time, from 0 to
3900 seconds, this condition can be active before the DAP issues an alarm. If a lost unit
fails to regain synchronization, you can regenerate the alarm by performing a RTN
(Return to Normal) function from the front panel of the central unit. (See "RTN
Function" in Chapter 7 for instructions.)