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Operation
3-9
3160-A2-GB21-80
March 1999
Table 3-4. Data Port LEDs (2 of 2)
Name MeaningColor
RXD Yellow Monitors activity on interchange circuit BB (CCITT 104) –
Received Data. This is data sent to the synchronous data DTE
from the data port on the DSU/CSU.
ON:
Ones are being sent to the synchronous data DTE.
OFF:
Zeros are being sent to the synchronous data DTE.
CYCLING:
Both ones and zeros are being sent to the
synchronous data DTE.
CTS Yellow Monitors the state of interchange circuit CB (CCITT 106) –
Clear-to-Send sent to the synchronous data DTE.
ON:
CTS is being asserted by the DSU/CSU.
OFF:
CTS is not being asserted.
RTS Yellow Monitors the state of interchange circuit CA (CCITT 105) –
Request-to-Send received from the synchronous data DTE.
ON:
RTS is being asserted by the synchronous data DTE.
OFF:
RTS is not being asserted.
NOTE:
The following procedures are examples only. Screen displays may vary
depending on the model of the DSU/CSU.
Displaying Unit Identity
The identity of the DSU/CSU (serial number, model number, software revision
level, hardware revision level, and customer identification) is available through
the Status branch of the front panel menu (see Appendix A,
Front Panel Menu
).
The customer identification is the only identity number you can change.
" Procedure
To display the DSU/CSU’s identity (ID):
1. From the top-level menu screen, select Stat.
F1
DSU ESF
Stat Test Cnfig
F2
F3
2. From the Status screen, press the key until the ID selection appears on
the screen.