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Chapter 3. Configuration
61200217L1-1 T3SU 300 User Manual 3-9
Off When OOS/OOF or Test
The SR lead remains on except when the unit receives an OOS/
OOF condition from the network or when the unit is executing a
test.
CD
Selects the control mode for the carrier detect (CD) lead. This field
only appears if a V.35 interface card is installed in the selected port.
Forced On
The CD lead remains active at all times.
Off When OOS/OOF
The CD control lead remains on unless the T3SU 300 receives an
OOS/OOF condition from the network.
Transmit Clock
Selects the source of the clock used to transfer data from the DTE to
the T3SU 300. This selection is only available if a V.35 interface card
is installed in the selected port. Use the following chart to
determine your selection:
Select... If...
Normal you want the transmit clock to be derived
from the T3SU 300.
Invert your DTE device cannot provide a trans-
mit clock signal and data errors are
present between your DTE and the T3SU
300.
External you are transmitting at high rates. This se-
lection eliminates data errors caused by
excessive delays in the DTE transmit clock
receiver, transmit data driver, and cable
length.