Electra Elite
Issue 6
System Hardware Manual
5 - 11
3.1.6
Replacing Memory Backup
The CPUB( )-U10 ETU provides memory backup for
approximately 21 days. The Ni-Cad battery should be
replaced about every two years.
1.
Remove the battery cable from CPUB( )-U10 ETU
CN4. Refer to
Figure 5-7 CPUB( )-U10 ETU
.
2.
Connect the cable from the new battery to CN4 on
the CPUB( )-U10 ETU.
3.
Turn off the KSU power.
4.
Remove the CPUB( )-U10 ETU from the slot in the
KSU.
5.
Using a suitable cutting tool, cut the tie wrap and
remove the old the battery.
6.
Fasten the new battery with a tie wrap.
7.
Install the CPUB( )-U10 ETU again.
8.
Turn on the KSU power.
3.2
CLKG-U10 Unit
3.2.1
Description
The CLKG-U10 Unit provides clock synchronization for
FT1 lines, ISDN-BRI lines, ISDN-PRI, and Wireless lines
that are connected to the system.
This unit works with the DTI-U10/20, BRT(4)-U10,
PRT(1)-U10/20, and BSU(2)-U10 ETUs and is
piggybacked on the CPUB ()-U10 ETU.
Содержание Electra Elite 192
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