Manual

S SI (Site Span I/O) Module Chapter 6: S SI R eplacement Procedures
Prerequisite
Coordinate this repair task with the OMCR operator .
Before you begin
Before you begin, enter the information into the following replacement list table.
Table 6 -3 Item Number R eplacement List
Item Number
BTS number
F ailed S SI number
SSI replacement procedure
This procedure requires working on or around circuitry which is extremely sensitiv e
to ESD . W ear a conductiv e, high impedance wrist str ap during the procedure. Use
appropriate safet y measures.
F or frames with more than one DMI — during the time that the S SI is powered
off or not connected to the DMIs, the DMIs will be rebooting continuously to try
to re -establish communication with the S SI. T o minimize the number of reboots
that could eventually cause the DMIs to swap partitions to an older code load (i.e.,
10 reboots), perform the "A T THE BTS SITE" portions of Procedure 6 -1 and then
Procedure 6 -2 within 5 minutes. If this is not possible, it is recommended to power
off all DMIs when the S SI is powered off . Then, power the DMIs back up after the
new S SI is powered up.
T o replace the S SI perform Procedure 6 -1 and then Procedure 6 -2 .
6 -6 68P09283A64 -3
FOA SEP 2007