Enterasys Networks X-PeditionTM manual T1/E1 & T3/E3 Alarm Analysis, Restart the controller

Troubleshooting T1/E1 & T3/E3 Links

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 show controller output:

•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 T1/E1 & T3/E3 Alarm Analysis Troubleshooting Flowchart (Part 1)

	Alarm Analysis
Receive Remote		Transmit Alarm Signal
	What kind of alarm is reported?
Indication (Yellow alarm)
		(Blue alarm)
- refer to Figure 1-4
		- refer to Figure 1-4

If a Receive Alarm Indication Signal (Blue alarm) is reported,

contact your service/network

provider

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

If a Transmit Remote Alarm Indication (Yellow alarm) is reported, check your settings at the remote site

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.

XSR User’s Guide 4-9