150-512-100-03, Revision 03
Functional Description
HRU-512 List 1
September 25, 1998
7
HDSL
OK LED lights green to indicate that the HDSL loop is synchronizing
with the HLU. A solid green state indicates that the loop is properly
synchronized with the HLU.
MAR LED lights yellow to indicate that the HRUs S/N MARgin on the
HDSL loop has dropped below the user defined margin threshold value.
This option is set at the HLU RS-232 front panel maintenance port in
the System Settings menu.
ES LED flashes red to indicate that one HDSL CRC error is detected.
RS-232
(Craft) port
Provides a connection port for a maintenance terminal. The
maintenance terminal allows access to the maintenance, provisioning,
and performance monitoring menus and screens.
Card handle
Pull on the card handle to remove the HRU-512 List 1 from the shelf
slot.
Table 1.
HRU-512 List 1 Front Panel Components (Cont.)
Name
Function
