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Appendix E: Indicators
239
Appendix E: Indicators
A6 A5 A4 A3 A2 A1
AT BO
Figure E-1. CCM Indicator Positions.
CCM LED
Indicator
Indicator
Definition
Off
Flashing
On
AT
Active Mode
Indicates a fault or
The unit is in a loopback
Normal operation
test condition
test mode
BO
Buffer Overflow
Buffer utilization is
Buffer utilization
Data has been lost
normal
exceeding 87%
because of a buffer
overflow
A1
Port A1
Error-free data is
High error rate on link
Receiving own transmit
passing through
or synchronization
data; modem is in
the link
has been lost with the
loopback
remote unit on the link
A2*
Port A2
No data activity
Data activity
Data activity
A3*
Port A3
No data activity
Data activity
Data activity
A4*
Port A4
No data activity
Data activity
Data activity
A5*
Port A5
No data activity
Data activity
Data activity
A6*
Port A6
No data activity
Data activity
Data activity
* If configured as a link, the indicator values are the same as for A1.
NOTE: The indicator on a force-connected sync port using either
Fast Packet or TDM protocols will remain
on
continuously.
Table E-1. CCM Indicators.