User Manual

S SI (Site Span I/O) Module Chapter 6: S SI R eplacement Procedures
SSI (Site Span I/O) Module
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SSI Description
The first instance of the S SI is located in the right, front side of the IDRF shelf of the UBS
Macro BTS Frame. F or S SI location, refer to the applicable Figure 1 -1 UBS Macro BTS
low -tier/low -capacity frame (1000 mm rack) on page 1 - 27 through Figure 1 -3 UBS Macro BTS
mid -capacity frame (1800 mm rack) on page 1 - 30 .
F or S SI connector identification, refer to Figure 1 -7 S SI front panel details on page 1 - 35 and
Figure 1 -8 S SI rear panel details on page 1 - 36 .
The S SI housing has a built -in mounting mechanism (see Figure 1 -8 S SI rear panel details on
page 1 - 36 ). This mounting mechanism allows the S SI to be mounted in the appropriate shelf .
One end of the S SI housing has two hooks that engage with two slots on the appropriate shelf .
The opposite end of the S SI housing has a right angle flange with two thumbscrews that secure
the S SI to the appropriate shelf .
The S SI operates from +27 V DC power supplied from a PDU S SI power connector that is
cabled to the POWER IN connector on the front of the S SI. A PDU S SI 20A circuit breaker
controls DC input power for the S SI.
The S SI contains I/O interface circuitry between the DMI and ancillary/external electronic
equipment. The specific equipment I/O and S SI connectors are as follows:
6 -2 68P09283A64 -3
FOA SEP 2007