Troubleshooting Terminal, Printer, and Serial Device Connections - Edition 5 (32022-90058)

TermDSM Commands
DI[AG]
Chapter 4
54
Description
Determines if the network is functioning properly by testing the connection between an
SNP and the network. The test tries to send and receive data from the network. To do
this, a VC is opened with a destination address on the local side. The correct X.25
address must be configured in the Level 3 Configuration screen in NMMGR.
Additionally, this address must be entered as the last parameter of the SNP network
loopback command. This test is executed only if X.25 is not started on this SNP (X25
Level 1, 2, and 3).
All loopback tests are disruptive in the sense they will abort any existing VC connections
on that SNP. Other SNPs in the DTC will not be effected.
When the subcommand is entered the following question is asked:
Do you want to stop looping if an error is found (yes/no)?
If you answer yes, the loopback tests will stop if an error is encountered. The following is
then printed on the terminal:
Please connect and make ready an X.25 network (power on, X.25 line
correctly configured, etc.) connection to the SNP card, before
answering the “How many times?” question.
How many times do you want to repeat this operation?
Enter the number of times you want to run this diagnostic function. Enter a number
between 1 and 65535. The following is then printed on the terminal:
Type CONTROL - Y to stop the looping.
You can use subsystem break (normally
[CTRL]-Y
to stop the diagnostic at any time. The
diagnostics prompt will be printed and you will be allowed to enter another
subcommand.
If TermDSM knows that this test has failed, an error message will be printed listing the
reason for the failure and how many milliseconds the test ran before failing. The
diagnostics prompt will be printed and you will be allowed to enter another
subcommand.