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Cisco ONS 15600 Reference Manual, R7.2
Chapter 1 Shelf and Backplane Hardware
1.6 Customer Access Panel
•
Four audio alarm interfaces via a DB-15 connector that is surge-protected and EMI-filtered. The
audio alarm indication is provided by the Timing and Shelf Controller (TSC) card and this interface
can receive a signal to disable the audio alarm.
•
Four visual alarm interfaces via a DB-15 connector that is surge-protected and EMI-filtered. The
visual alarm indication is provided by the TSC card and the signal is connected to the PDU where
LEDs indicate the alarm status and severity.
•
Environmental (external) alarms and controls (16 inputs and 16 outputs) via wire-wrap pins. The
interface is surge-protected and provides isolation by using an opto-isolator for alarm inputs and
relays for alarm outputs. By connecting to different wire-wrap pins on the CAP, the alarm outputs
can be configured for either normally open (NO) or normally closed (NC) operation. Alarms are
initiated by shorting these contacts. The alarm input interface provides a pair of positive and
negative wire-wrap pins.
The isolation and termination meet the intra-building lightning surge specified in Telcordia GR-1089.
The CAP has –48 VDC monitoring with I
2
C interface and nonvolatile memory to store the CAP revision
information.
Figure 1-8 shows the CAP faceplate.
Figure 1-8 CAP Faceplate and Connections
78485
Wire
wrap
pins
LAN
RJ-45
Craft
DB-9
Audible
Alarm
DB-15
BITS
OUT
BNC
BITS
OUT
BNC
LAN
RJ-45
Craft
DB-9
BITS
IN
BNC
BITS
IN
BNC
Serial Number Label
Part Number Label
Bar Code and
Country of Origin
Labels
Backplane
connectors
Visual
Alarm
DB-15