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Cisco AS5350 and Cisco AS5400 Universal Gateway Card Installation Guide
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Chapter 6 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
T1, E1, and T3 DFCs. (See Figure 6-7.)
Figure 6-7 Bantam Ports
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, see 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 T3 DFC.
The bantam jack connectors located on the front panel of the T3 DFC 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. To prevent accidental use of the push button
in drop-insert mode, use the test trunk drop-insert privileged EXEC command to disable the
drop-insert mode on the specified T3 controller.
35840
T1 or E1 ports
Bantam ports
0
Rx
ACT
2 P
R
I
OK
Tx
1