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7. Operation and Maintenance
9700-A2-GB20-20 December 2002 7-7
Table 7-2. Control Leads
Label Indication What It Means
General
OK Operational The device’s hardware and firmware are
operational.
Alarm Alarm Present The device has detected a fault that may
interfere with operation.
Test Test in Progress The unit is in a maintenance mode, such as a
loopback test.
ATM Mode
(9783,
9788)
ATM Mode is Active The unit is configured for ATM operation. The
front panel ATM LED is on.
Network Interface (9783, 9788)
Data Mode Data Mode Active The unit has trained up and is operating in
normal data mode. The front panel DSL LED is
on.
LOS Loss Of Signal An LOS condition has been detected on the
network. The front panel ALM LED is on.
Training Training in Progress The unit is training and the DSL LED is flashing.
LCD Loss of Cell Delineation An LCD alarm condition has been detected. On
the 9783, the front panel ATM LED is yellow.
Network Interface (9720)
OK DSL Line OK The unit has trained up and is operating in
normal data mode. The front panel DSL LED is
on.
LMI OK LMI Operating The LMI is operating successfully on the first
frame relay link on the network interface.
Port-1 — CSU/DSUs only
OK Port-1 is Active The user data port is transmitting and receiving
data.
TXD Transmit Data Data is being sent to the far-end device.
RXD Receive Data Data is being received from the far-end device.
DTR Data Terminal Ready The DTE is not ready to operate.
RTS Request to Send The DTE has indicated that it is ready to transmit
data.
Ethernet
OK Ethernet is Active The Ethernet connection is transmitting and
receiving data.