T1/E1 & T3/E3 Alarm Analysis; Receive Alarm Indication Signal (Ais - Blue Alarm) - Enterasys Security Router X-PeditionTM User Manual

2. Restart the controller:
XSR(config-controller<T1/0>)#no shutdown
If the T1/E1or T3/E3 controller and line are not up, check that either the T3/E3 NIM LOS or LOF
LEDs are shining or one of the following messages displays in the
• Receiver has loss of frame (LOF), or
• Receiver has loss of signal (LOS)
Complete the following steps if the receiver has loss of frame:
1. Ensure the framing format set on the port matches the framing format of the line. If needed,
change the framing format configuration.
2. Change the Line Build-Out (LBO) using cablelength long/short (T1) or cablelength (T3)
commands. If needed, contact your service provider for more details on LBO configuration.
Complete the following steps if the receiver has a loss of signal:
1. Ensure the cable between the interface port and the T1/E1 or T3/E3 service provider
equipment is connected correctly.
2. Check the cable integrity by looking for breaks or other physical abnormalities in the cable.
3. Check the cable connectors.
T1/E1 & T3/E3 Alarm Analysis
Perform the following steps to troubleshoot for various alarms that can occur within the T1/E1 or
T3/E3 subsystem. The following troubleshooting flowchart displays the procedures.
Figure 4-4
Receive Remote Alarm
Indication (Yellow alarm)
If a Receive Alarm Indication
Signal (Blue alarm) is reported,
contact your service/network

Receive Alarm Indication Signal (AIS - Blue Alarm)

1. Check that the framing format of the controller port matches the framing format of the line
provided by your service provider.
T1/E1 & T3/E3 Alarm Analysis Troubleshooting Flowchart (Part 1)
- refer to Figure 1-4
provider
Alarm Analysis
What kind of alarm is reported?
If a Transmit Sending Remote Alarm
(Red alarm) is reported, check
your settings at the remote end
If your T1/E1 or T3/E3 controller still
does not function as desired,
contact your service/network provider
Troubleshooting T1/E1 & T3/E3 Links
show controller output:
Transmit Alarm Signal
(Blue alarm)
- refer to Figure 1-4
If a Transmit Remote Alarm
Indication (Yellow alarm) is
reported, check your
settings at the remote site
XSR User's Guide 4-9