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Common Control Module
Front Panel
Table 3-2
shows the CCM front panel and explains the function of each switch and indicator. You
can check the operation of each unit by monitoring the front panel indicators. The colors of the LED
indicators on the modules front panels are consistent in function:
•
Red and yellow are used for alarms or "service-affecting" conditions. This includes test
modes that are interfering with normal user data.
•
Alarm conditions depend on the modules, but normally, red indicates a Major Alarm (a
number of problems), and yellow indicates a Minor Alarm (channel alarms).
•
The green LED indicators are used for all other conditions, including data activity and
E&M signaling leads.
Table 3-2
CCM Front Panel
Front Panel
In
Svce
Stand
By
Init
Alm
Test
Card
Fail
Dsbl
8kRef
T Ref
Gnd
CCM 10
Note
The disable button of the CCM must be depressed before removing the module from the shelf. Failure to do
so may result in loss of program code which requires a download.
036R340-000
Issue 16
Item
Description
In Service
Green LED indicates when the channel is entered in the currently
active TDM configuration. This indicates that the module is operating.
Stand By
Green LED indicates the module is configured, and ready to go into
service when needed.
Initialization
Yellow LED indicates that the module is running boot firmware. Also
flashes during software download.
Alarm
Yellow LED indicates if any of the following conditions exist: Remote or
local out-of-sync, power-on self-test failed, hardware configuration
mismatch, or download failure.
Test
Yellow LED indicates that one of the following diagnostic tests are being
performed: Power-on self-test or other diagnostic test.
Card Fail
Red LED indicates that module has detected an internal failure.
Disable
Press to disable module before extracting it, or to force a redundant
switchover.
Test Points
8kREF - 9.216 Mhz system clock divided down to 8khz
TRef - Timing reference derived from LIM receive Clock.
Office Connunications Manager OCM-1000/OCM-2000
Installation & Operation
Front Panel
3-7
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