Cisco ONS 15454 DWDM - Power Monitoring

16-28
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
April 2006
Chapter 16 Card Reference
16.4.1 OSCM Card
Figure 16-10 OSCM Block Diagram
Figure 16-11 shows the block diagram of the variable optical attenuator (VOA) within the OSCM.
Figure 16-11 OSCM VOA Optical Module Functional Block Diagram
16.4.1.1 Power Monitoring
Physical photodiode P1 monitors the power for the OSCM card. The returned power level value is
calibrated to the OSC TX port (Table 16-16).
ASIC
OC3-ULR
Optical
transceiver
OSC Line
OC-3
FPGA
OC-12
POS
OC-3
MII
96476
Processor
VOA
Physical
Interface
DC/DC
19.44 MHz
Line Ref clock
Power supply
Input filters
BAT A&BMT CLKt
0 Slot
1-6
MT CLKt
0 Slot
12-17
6
MP
SCL Bus
to TCCs
FE
FE User
Data
Channel
6
TOH &
Cell Bus
P1
P1
OSC TX
Physical photodiode
OSC Variable optical attenuator
Control
Module
OSC RX
Control
Interface
124968
Table 16-16 OSCM VOA Port Calibration
Photodiode CTC Type Name Calibrated to Port
P1 Output OSC OSC TX