Cisco 7000 Hardware Installation And Maintenance page 279

FSIP LEDs
The FSIP LEDs are shown in Figure B-11. As with the other interface processors, the enabled LED
goes on to indicate that the FSIP is enabled for operation. However, unlike the LED cluster at the top
of the other interface processors, the LEDs for each serial port are adjacent to the connector.
Table B-2 lists descriptions of each LED.
Figure B-11
The Conn (connected) LED goes on when the interface is connected to the network. During normal
operation, the three other LEDs light to indicate data and timing signal traffic, or an idle pattern that
is commonly sent across the line during idle time.
Table B-2
LED
RxC
RxD
TxC
Conn
The labels on each LED indicate the signal state when the FSIP port is in DTE mode. However, the
direction of the signals is reversed when the FSIP port is in DCE mode. For example, a DCE device
usually generates a clock signal, which it sends to the DTE device. Therefore, when the Receive
Clock (RxC) LED goes on, on a DTE interface, it indicates that the DTE is receiving the clock signal
from the DCE device. However, when the RxC LED goes on, on a DCE interface, it indicates that
the DCE is sending a clock signal (RxC) to the DTE device. Because of limited space on the FSIP
faceplate, only DTE mode states are labeled on each port.
FSIP LEDs
FSIP LEDs
DTE Signal
Receive Clock (from DTE)
Receive Data (from DTE)
Transmit Clock (from DCE)
Connected
DCE Signal
(TxC) Transmit Clock (to DTE)
(TxD) Transmit Data (from DTE)
(RxC) Receive Clock (to DTE)
Connected
Interface Processor LEDs
Reading LED Indicators B-275