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PA-4T+ Synchronous Serial Port Adapter Installation and Configuration1-16
If any of the above conditions are not met, or if the initialization fails for other reasons, the enabled
LED will not go on. Table 1-8 lists port LED status indications.
Table 1-8 PA-4T+ Port LEDs
LED Label Color State Function
EN Green On Indicates ports are ready.
TD Green On DTE—Transmit data out.
DCE—Transmit data in.
TC Green On DTE—Transmit clock in.
DCE—Transmit clock in (TXCE).
RD Green On DTE—Receive data in.
DCE—Receive data out.
RC Green On DTE—Receive clock in.
DCE—Receive clock out.
LB/CD Green On Indicates DTR, DSR, RTS, CTS, or DCD is active.
Green Flashing Indicates RTS, CTS, or DCD is sending and receiving
data in half-duplex mode.
Yellow On Indicates local loop or internal loop active.