Troubleshooting During The Test Phase; Performing Loopback Tests On The Flex-Wan Serial And Ultra-Wan Csu/Dsu Interfaces - 3Com 3C8S5007 - SuperStack II PathBuilder S500 Switch User Manual

Performing Loopback Tests on the Flex-WAN Serial and Ultra-WAN CSU/DSU Interfaces

Troubleshooting
During the Test Phase
Performing
Loopback Tests on
the Flex-WAN Serial
and Ultra-WAN
CSU/DSU Interfaces
When the software load is complete, the system begins the test phase. If
the Test LED lights amber, a problem occurred during the system test
phase.
Green
Status
Amber
SYSTEM
Meaning: EEPROM checksum test failed.
Action: Contact your network supplier.
This section describes how to perform path-based, transmit-to-receive
loopback tests on Flex-WAN serial interfaces and Ultra-WAN CSU/DSU
interfaces.
Figure 44 shows the data flow that occurs when a Tx to Rx loopback test
is performed between the PathBuilder switch and an appropriate link
partner. A modem CSU/DSU link partner is required in this configuration
for Flex-WAN loopbacks. A central office/PTT switch interface or CSU link
partner is required in this configuration for Ultra-WAN loopbacks.
Figure 44 Tx to Rx Loopback Testing Data Flow
PathBuilder switch
Before running the loopback test, complete the following tasks:
Attach a console or Telnet to your PathBuilder switch.
Run
Fwd
Load
Amber
Test
Power
/Fault
123
Link partner