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Description
The Blue Alarm signal is an unframed all ones signal. It is transmitted by a
remote device (usually a CSU) and when received, indicates a
transmission failure upstream of that device toward the local end. The
AIS alarm signal is also known as the keep alive signal in that it prevents
the T-1 circuit repeaters from malfunctioning when transmit from the
remote end is lost. By default, the Blue Alarm is enabled for all T-1 Trunks.
Yellow Alarm
Programming Steps
1. Press the YELLOW flexible button (FLASH 47, Button #3). Button #3
2. Enter a 0 or 1 on the dial pad to enable/disable this feature.
3. Press HOLD button to save entry. A confirmation tone is heard and
4. Continue programming the Yellow Alarm parameters using steps
Description
The Yellow Alarm is recorded when the T-1 Trunk card detects a yellow
Carrier Failure Alarm (CFA) signal from the distant end for a minimum
335 ms (for D-4 framing). The Yellow Alarm is transmitted by the remote
system because of a RED alarm condition there. By default, the Yellow
Alarm is enabled for all T-1 Trunks.
and Button #11 LEDs are lit steady. The following message displays:
Y ELLOW AL AR M
EN AB LE D
[0] = Disabled
[1] = Enabled
the display updates.
provided in this section for Clearing the alarm, Minor alarm, Major
alarm, Time Period and Attendant display.
T-1 Alarm Programming
0- 1
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