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Cisco AS5400 Universal Gateway Chassis Installation Guide
OL-2847-02 0A
Chapter 4 Troubleshooting
Using the Bantam Jacks for Test Port Functionality
Using the Bantam Jacks for Test Port Functionality
Test port functionality is supported by Cisco IOS Release 12.1(2)XD and later releases.
Monitoring Mode for the T1, E1, and T3 DFCs
The monitor mode is available on the T1, E1, and T3 dial feature cards.
If a T1 controller does not come up, or there is a large number of errors associated with a particular
controller, you might be able to determine whether the problem is in the DFC or in an external T1 line
by using the test port. The test port is a set of bantam jack connectors located on the front panel of the
DFCs.
In monitor mode, you can monitor only the ingress side of the T1 line without disrupting that line.
The bantam jack connectors located on the front panel of the DFCs allow the connection of an external
test device (for example, a FIREBERD test device) to monitor the individual T1 circuit in monitor mode.
Use software commands to select a T1 line. For information on software commands, refer to the
Cisco AS5350 and Cisco AS5400 Universal Gateway Software Configuration Guide
for details.
Passive monitoring equipment is used to listen on the TX MON and RX MON jacks during regular
operation to detect T1 errors.
Connecting test equipment to the following bantam jack connectors provides various functions:
•
TX MON can monitor signals coming out of the test port without interrupting normal data
transmission.
•
RX MON can monitor signals going in to the test port without interrupting normal data transmission.
Drop and Insert Mode for the CT3 DFC
Drop and Insert mode is available on the CT3 dial feature card.
The bantam jack connectors located on the front panel card allow the connection of an external test
device (for example, a FIREBERD test device) to test any of the 28 individual T1 circuits in drop-insert
mode. In drop-insert mode, the T1 line is dropped out of service.
Note
In Drop and Insert mode, the T1 line is dropped out of service. To prevent
accidental use of the push button in Drop and Insert mode, use the
test trunk
drop-insert
privileged EXEC command to disable the Drop and Insert mode on the
specified T3 controller.
The
test trunk drop-insert
privileged EXEC command is used to enable or disable Drop and Insert
mode on a T3 controller. When the system initially boots up, the Drop and Insert mode is disabled on all
T3 controllers.
