Data port leds, Table 3-4 – Paradyne 3161-B3 User Manual
Page 42
3. Operation
3-8
February 2001
3160-A2-GB21-90
Table 3-4.
Data Port LEDs
Name
Color
Meaning
DTR
Green
Monitors the state of interchange circuit CD (CCITT 108/1, /2)
–
Data Terminal Ready received from the synchronous data DTE.
ON: DTR is being asserted by the synchronous data DTE.
OFF: DTR is not being asserted.
TXD
Yellow
Monitors activity on interchange circuit BA (CCITT 103)
–
Transmitted Data. This is the data sent from the synchronous
data DTE to the data port on the DSU/CSU.
ON: Ones are being received from the synchronous data DTE.
OFF: Zeros are being received from the synchronous data DTE.
CYCLING: Both ones and zeros are being received from the
synchronous data DTE.
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.