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COMSPHERE –48 Vdc Central Office Power Unit
2-6 May 1998 3000-A2-GB41-40
Setting the Option Straps
The option straps are screw switches that are set by
raising (loosening) or lowering (tightening) the screw to
break or make the contact. There are five option straps, S1
through S5, on the CO Power Unit’s backplane (see
Figure 2-2).
NOTE
Older power modules have
straps labeled S1 and S2. These
should always be in the raised
position.
Basic Mode
If you want to operate in the Basic mode, you must use
one –48 Vdc power source and configure the option straps
as shown in Table 2-2.
Table 2-2
Settings for Basic Mode
S1 Lowered
S2 Lowered
S3 Lowered
S4 Lowered
S5 Lowered
To set the option straps for Basic mode of operation:
" Procedure
1. Tighten the screws on all five straps (S1 through
S5) on the CO Power Unit’s backplane. Make sure
that the screws are securely touching the contacts,
but do not screw the straps too tight because doing
so can damage the equipment.
S1
S2
S3
S4
S5
CO Power Tray
496-13695-01
CO Power Unit
Backplane
Figure 2-2. Option Straps (S1 through S5) on the CO Power Unit’s Backplane