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You can get further help in any of the following ways:
1.
Type help option to display the possible values for the option:
[ CMD: ] help dtr
The 7500 will respond:
[ current value
[ possible values = follow
2. Type help command to list all commands or options that begin with the letters typed:
[ CMD: ] help re
The 7500 will respond:
[ redial
3. Type help command to get a brief description of how to use the command or a brief description
of the options that are available with the command:
[ CMD: ] help end
The 7500 will respond:
[ Type END to end a data call in progress. ]
Testing Your 7500 Data Module
In addition to the tests described in CHAPTER 3: FRONT PANEL FEATURE ACCESS, you can
do two tests from your attached data terminal on your 7500. The two tests are the Local Loopback and
the Remote Loopback test. To do these two tests, you will use the test command. Taken together, these
two tests can help you isolate data communications problems.
Local Loopback Test
The purpose of the local loopback test is to ensure that there are no data transmission errors in the
local part of the data transfer circuit (between the data terminal and the 7500). When the local
loopback test is initiated, data travels from the data terminal to the 7500, where it is looped back to the
data terminal. You can do local loopback tests when the set is idle (local-idle mode) or when it is
engaged in a data call (local-data mode).
To initiate a local loopback test at the [ CMD: ] prompt:
1 . Type test local on your data terminal.
[ LOCAL LOOPBACK TEST ]
[ ENTER ATTENTION SEQUENCE TO END TEST ]
2. Type characters on your terminal keyboard. They will be echoed on your screen.
If you find no errors, the 7500 passed the test.
3.
Rapidly type the Attention sequence (default value is +++) to end the test.
[ LOCAL LOOPBACK TEST ENDED ]
CHAPTER 5: ASYNCHRONOUS DCE CONFIGURATION
= ignore ]
ignore ]
rec.flow
? ]
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