17-22
Cisco ONS 15454 Procedure Guide, R5.0
March 2005
Chapter 17 DLPs A1 to A99
DLP-A19 Install Alarm Wires on the Backplane
• If you are using a 100-A fuse panel, insert a 30-A fuse into the fuse position according to site
practice.
Step 3 Using a voltmeter, verify the shelf for –48 VDC battery and ground:
a. To verify the A side of the shelf, place the black lead of the voltmeter to the frame ground. Place the
red test lead to the BAT1 (A-side battery connection) red cable. Verify that it reads between
–40.5 VDC and –57 VDC. Then place the red test lead of the voltmeter to the RET1 (A-side return
ground) black cable and verify that no voltage is present.
Note The voltages –40.5 VDC and –57 VDC are, respectively, the minimum and maximum
voltages required to power the chassis.
b. To verify the B side of the shelf, place the black test lead of the voltmeter to the frame ground. Place
the red test lead to the BAT2 (B-side battery connection) red cable. Verify that it reads between
–40.5 VDC and –57 VDC. Then, place the red test lead of the voltmeter to the RET2 (B-side return
ground) black cable and verify that no voltage is present.
Step 4 Return to your originating procedure (NTP).
DLP-A19 Install Alarm Wires on the Backplane
Step 1 Using 100-ohm shielded building integrated timing supply (BITS) clock cable pair #22 or #24 AWG
(0.51 mm² or 0.64 mm²) twisted-pair T1-type wires, wrap the alarm wires on the appropriate wire-wrap
pins according to local site practice. Ground the shield of the BITS Input cable at the BITS end. For BITS
Output, wrap the ground shield of the BITS cable to the frame ground pin (FG1) located below the
column of BITS pins.
Figure 17-11 shows backplane alarm pin assignments for the AIC-I in ONS 15454 Release 3.4 or later.
Note The AIC-I requires a shelf assembly running Software Release 3.4.0 or later. The backplane of
the ANSI shelf contains a wire-wrap field with pin assignment according to the layout in
Figure 17-11. The shelf assembly might be an existing shelf that has been upgraded to R3.4. In
this case, the backplane pin labeling will appear as indicated in Figure 17-13 on page 17-24, but
you must use the pin assignments provided by the AIC-I as shown in Figure 17-11.
Purpose This task installs alarm wires on the backplane so that you can provision
external (environmental) alarms and controls with the AIC or AIC-I card.
Do not perform this task if you are using the Alarm Expansion Panel (AEP).
Tools/Equipment Wire wrapper
#22 or #24 AWG (0.51 mm² or 0.64 mm²) wires
100-ohm shielded BITS clock cable pair #22 or #24 AWG (0.51 mm² or
0.64 mm²), twisted-pair T1-type
Prerequisite Procedures None
Required/As Needed As needed
Onsite/Remote Onsite
Security Level None
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