Troubleshooting Terminal, Printer and Serial Device Connections - Edition 4 (32022-90030)

46 Chapter 4
TermDSM Commands
DI[AG] I[NTERNAL]
DI[AG] I[NTERNAL]
Determines if a specific port is functioning properly without
disconnecting the device from the port.
Security level: 2.
Syntax
I[NTERNAL] dtcnum,cardnum,portnum
Parameters
dtcnum The number TermDSM associates with a particular
DTC. The DTC command lists each DTC with its
assigned number. This list is also printed when you
make a mistake while typing in a DTC number.
cardnum Number of the interface card within the DTC to which
the device is connected. The cards are numbered from
zero beginning at the bottom of the DTC.
portnum Number of the port on the interface card. As you face
the back of the DTC, the ports are numbered from zero
beginning at the left of the board.
Description
This diagnostic cannot test all the functions that are possible with a
hood (loopback connector), since the DTC connection itself cannot be
tested without a hood. However, this diagnostic has the advantage that
no cables need to be disconnected from or additional equipment
connected to the port.
When the subcommand is entered you will be asked:
Do you want to stop looping if an error is found (yes/no)?
If you answer yes, the series of loopback tests will stop if an error is
encountered. For example, you specified you want the test to run 10
times and an error is encountered in the third test. If you answered yes
to the above question, the remaining seven loopback tests will not be
run. If you answered no, all 10 loopback tests will be executed
regardless of the results of each test. The following question is then
printed on the terminal:
How many times so you want to repeat this operation?
You should then enter how many times you want to run this diagnostic
function. Enter a number between 1 and 65535. The following is then
displayed:
Type CONTROL_Y to stop the looping.