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5.
6.
Note
The site will already be "off air" if it has been locked.
7.
8.
9.
10.
11.
12.
Note
The newly chained BTS site should remain in the locked state until you have
completed the commissioning procedures. Do not request a BCF unlock until you
have commissioned the BTS chain.
40 (50)
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Request a BCF lock for the site from the BSC or NMS. You can check if
the site has been locked by connecting a BTS Manager laptop to the master
BTS in the chain, starting BTS Manager and checking TRX PROPERTIES
in the Supervision - Equipment View window (right-click with the mouse
over a TRX in the window).
Power OFF the master BTS. Inform your Operations Manager before doing
this and follow the procedures for powering down a BTS.
Power OFF the master BTS by turning the switch on the power supply unit
to Stand-by.
On the master BTS, connect the end of the chaining cable marked "Master"
to the upper "EXT" connector on the interface unit. See Figure 12 for an
illustration of the connection.
On the slave BTS, connect the "slave" end of the cable which comes
coming from the master BTS to the lower "EXT" connector on the
interface unit. See Figure 12 for an illustration of the connection.
If a second slave BTS cabinet is required (making a three BTS chain),
connect the master end of the chaining cable from the upper "EXT"
connector on the first slave BTS to the lower "EXT" connector on the
interface unit of the second slave BTS (the third BTS in the chain). See
Figure 12 for an illustration of the connection.
Fit a termination connector to the first, unused lower "EXT" connector in
the chain. This will be in the master BTS, depending on the number of
BTSs in the chain.
Route the cables through the appropriate slots cable entry blocks on the
BTS cabinets and secure them with cable ties to the cable entry plate.
Figure 8 shows the cable entry block.
You can now commission the BTS. Follow the instructions given in
Chapter 7.2 of this document, Commissioning the BTS chain.
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