Cabletron Systems MicroMMAC 22ES Installation Manual page 52

Chapter 3: ROM Monitor Commands
monitor:: ports
Individual Port Tests (Data and Control Lines)
Some important notes:
- All Serial Ports (1-7) which are to be tested require a
loopback plug in order to pass the Data Line and Control Line
loopback tests.
WARNING. If there is a device instead of a loopback plug
connected to the port being tested, the device will have data
transmitted to it and its Control Line toggled.
Ports with faulty Control Lines:
Ports with faulty Data Lines:
Enter port number or range of ports to test (Return to exit):: 3
Enter the number of times to loop on this test [1]::
Testing data lines on channel 3
ERROR -- Data line loopback failure on port 3 Testing modem
signals on channel 3
ERROR -- No RTS/CTS turning (ON) loopback interrupt sensed on
Chan 3 !
Pressing the RETURN key after the prompt Selection (Return to exit)
returns you to the monitor prompt.
If you enter the ports –d command, only the data lines are tested. The
outgoing control lines are asserted during this test.
monitor:: ports -d
Individual Port Tests (Data Lines)
Some important notes:
- All Asynch Serial Ports (2-16) which are to be tested require a
loopback plug in order to pass the Data Line loopback tests.
WARNING. If there is a device instead of a loopback plug
connected to the port being tested, the device will have data
transmitted to it.
You may enter a list of ports to test separated by spaces/commas.
You may also enter ranges of ports, such as 2-16.
Ports with faulty Data Lines:
Enter port number or range of ports to test (Return to exit)::
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Micro-CS Installation Guide