Cisco ONS 15454 DWDM Reference Manual

3-12
Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 3 Optical Service Channel Cards
3.4.1 Power Monitoring
Figure 3-10 shows the OSC-CSM optical module functional block diagram.
Figure 3-10 OSC-CSM Optical Module Functional Block Diagram
3.4.1 Power Monitoring
Physical photodiodes P1, P2, P3, and P5 monitor the power for the OSC-CSM card. Their function is as
follows:
• P1 and P2: The returned power value is calibrated to the LINE RX port, including the insertion loss
of the previous filter (the reading of this power dynamic range has been brought backward towards
the LINE RX output).
• P3: The returned value is calibrated to the COM RX port.
• P5: The returned value is calibrated to the LINE TX port, including the insertion loss of the
subsequent filter.
The returned power level values are calibrated to the ports as shown in Table 3-5.
P P
P
P
P
V
V
124897
MON RX
MON TX
COM TX
OSC RX
COM RXLINE TX
LINE RX
DROP
section
ADD
section
OSC TX
Control
Interface
Filter
Filter
S1
P1
P2
P5
P4
PV1
PV2
P3
HW Switch
Control
Opt. Switch
S2
Virtual photodiode
Physical photodiode
Variable optical attenuator
P
V
Optical splitter
Control

Cisco ONS 15454 DWDM Specifications

General

Chassis Type	DWDM
Form Factor	Rack-mountable
Slots	17
Storage Temperature	-40 to 158°F (-40 to 70°C)
Relative Humidity	5% to 95% non-condensing
Power Supply	AC or DC
Cooling	Internal fans
Operating Temperature	23 to 104°F (-5 to 40°C)
Altitude	0 to 6500 ft (0 to 1981 m)
Safety Compliance	EN 60950-1
EMI Compliance	FCC Part 15