Nortel DMS-100 Series Maintenance Manual page 32

2-12 Star Remote System hardware
Power converter configurations in the Star Hub The Star Hub can have either
two or four power converters. The valid possible configurations are
•
•
To set the power converter configuration, subfield FULL_DRWR_CONF in
table LCMINV field LCMTYPE must be entered when the Star Hub is
installed. The default value Y indicates a full configuration. When N is
entered, the half configuration is chosen.
The half configuration means that only slots 03 and 20 have power converters
and supply power to the RCP and to drawers 1 to 9. The full configuration
means the other two power converters in slots 05 and 18 supply power to
drawers 10 and 18.
The following list describes the behavior of power converters in the Star Hub:
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•
•
•
•
Note: Changes to the power converter configurations, from half to full
configuration, cannot be made while the Star Hub is in service.
Circuit card status indicators
The following figure shows the circuit cards with status indicators.
297-8353-550 Standard 05.01 March 2001
full configuration - four power converters to support from 1 line to 1152
lines using line drawers 1 through 18
half configuration - two power converters to support up to 576 lines in line
drawers 1 through 9
upgrades from a half to full configuration are not supported while the Star
Hub is in ESA mode
if one of the power converters is removed from the unit, that unit is in the
out-of-service state and the other unit works in takeover mode
if one of the main power converters (in slots 03 or 20) fail, the power
converter of the other unit supplies power to the unit with the failed power
converter
in a full configuration, if both of the power converters in slots 05 and 18
fail, the Star Hub do not support lines connected to line drawers 10 to 18
downgrades from a full to half configuration are not supported