Enterasys Networks Security Router X-PeditionTM - Manual (Page 99)

Troubleshooting T1/E1 & T3/E3 Links
XSR User’s Guide 4-11
Figure 4-5 T1/E1 & T3/E3 Alarm Analysis Troubleshooting Actions Flow (Part 2)
T1/E1 & T3/E3 Error Events Analysis
This section describes various error events that can occur on controller lines and provides
troubleshooting information to fix some of these errors. The
show controller command displays
the status and statistics specific to the hardware. This information is useful for diagnostic tasks.
All problems that can occur are captured by the underlying hardware and reported by the show
controller output. Here are some troubleshooting steps you can perform with a flowchart
displaying troubleshooting actions.
Receive Remote Alarm Indication
Yes
Does framing on
the port match the
line setting?
Use the following
commands to set
framing:
controller t1 x
framing
No
No
No
Yes
Yes
(Yellow alarm) - see Figure 1-2
Transmit Alarm Indication Signal
Insert external loopback cable
in the port
Are there any
alarms?
Check the
cabling
Power
cycle the
XSR
Connect
the
line to a
different
port
Does the
problem
persist?
Perform
loopback
test
Error Events Analysis
Does the
problem
persist?
Perform
loopback
test
Connect
the
line to a
different
port
Does the
problem
persist?
Power
cycle the
XSR
(Blue alarm) - see Figure 1-2
Check the
cabling
This problem is fixed
The port may be
defective
Error Events Analysis
Check the
settings on
the remote
end
Contact your
service/
network
provider
Reconnect the
line to
the original
port
Yes
Yes
No
No
- refer to Figure 1-5 - refer to Figure 1-5