Section 150-219-100-02
December 22, 1997
Page 8
HDU-217/219 and
HCC-239 List
1
For example, if the solar load is removed from the SPC 7430-8 T1 slot
enclosure, whose capacity is two doubler units with solar load,
capacity is increased to three doubler units. But this would
necessitate placing two doublers side by side, with no empty slot
between them. This violates the adjacency rule and thus forbids this
shelf configuration.
The empty slot requirement can be waived by reducing the otherwise
allowed capacity by one for every two doubler units that do not have
an empty slot between them. For instance, if the application allows
for seven doublers, but two are directly adjacent with no empty slot
between them, then the total capacity must be reduced to six.
Standard T1 and DDS repeaters can be installed in the same apparatus
case with the doubler unit. If this method is used, the maximum
number of doubler units that can occupy the same case with the
standard repeaters must be reduced by one for every four T1 repeaters
(or fractions thereof) installed and by one for every single DDS/ISDN
repeater installed.
For optimal performance, T1 and DDS repeaters located with doubler
units in outdoor enclosures should be placed in slots that are not
adjacent to the doubler units.
The 819 enclosure has two individual isolated chambers. Slots 1
through 14 are in one chamber. Slots 15 through 25, along with the
PRES, ALT, CAP, and COIL slots are in the other chamber.
Slot 7 of the 819 enclosure cannot be used for
doubler units because of mechanical interference
between the doubler unit cover and a mounting
screw in the cavity adjacent to slot 7.
There are 15 different models of the 819 enclosure. The
HDU-219
is
compatible only with the following four models:
•
819 A1
•
819 A2
•
819 B1
•
819 B2
