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Cisco AS5800 Universal Access Server Dial Shelf Card Guide
78-7097-03
Chapter 3 Channelized T3 Trunk Card
Using the Test Port
Trunk Card Bantam Jacks
The test port is a set of bantam jack connectors located at the bottom of the CT3 front panel (see
Figure 3-4). The bantam jacks 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-and-insert mode or to monitor
an individual T1 circuit in monitor mode.
• 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.
• In monitor mode, you can monitor only the ingress side of the T1 line. The T1 line being monitored
is not disrupted, and the line maintains its HDLC and modem connections through TDM.
Drop-and-Insert Mode
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.
To drop a particular T1 line to the test port, follow these steps:
Step 1 Enable drop-and-insert mode by entering the test trunk drop-insert on privileged EXEC command as
follows:
AS5800# test trunk drop-insert on shelf/slot/unit
Note The shelf/slot/unit identifies the T1 to the CT3 controller.
Step 2 Push and quickly release the push button below the LED to toggle to the port number. The push button
is labeled “MONITOR #” in Figure 3-3.
Note You must release the push button within 2 seconds to advance through the port
numbers (from 1 to 28). After port 28, the display returns to port 1.
Step 3 Push and hold the push button for two or more seconds.
The letter “D” (indicating drop-insert) is displayed in the front panel LED, indicating that the particular
T1 line has been dropped to the test port.
Note To select another port number, press the push button again and hold it for two or
more seconds. You can now toggle to another port number.
Step 4 Disable the drop-and-insert mode after testing the T1 lines. We recommend that you disable
drop-and-insert mode to prevent accidental use of the push button on the CT3 board.
To disable drop-and-insert mode, enter the test trunk drop-insert off privileged EXEC command as
follows:
AS5800# test trunk drop-insert off shelf/slot/unit