Specifications

4-6
Cisco ONS 15530 Planning Guide
OL-7708-01
Chapter 4 Optical Loss Budgets
Optical Loss for 10-Gbps ITU Tunable and Non tunable Trunk Cards
Optical Loss for 10-Gbps ITU Tunable and Non tunable Trunk
Cards
In both the receive and transmit directions, splitter 10-Gbps ITU tunable and non tunable trunk cards
attenuate the ITU signal significantly more than the nonsplitter 10-Gbps ITU tunable and non tunable
trunk cards.
Table 4-5 shows the optical loss for the splitter and nonsplitter 10-Gbps ITU tunable and non tunable
trunk cards supported by the Cisco ONS 15530 in the transmit and receive directions.
Optical Loss for OADM Modules
OADM (optical add/drop multiplexer) modules attenuate the signals as they are multiplexed,
demultiplexed, and passed through. The amount of attenuation depends upon the path the optical signal
takes through the modules.
Loss for Data Channels
Table 4-6 shows the optical loss for the data channels between the 4-channel OADM modules and the
line cards, and between the pass-through add and drop connectors on the OADM modules.
Note The insertion losses listed in Table 4-6 are worst case values. Take this into consideration when
calculating the minimum loss budget.
Table 4-5 Optical Loss for 10-Gbps ITU Tunable and Non tunable Trunk Cards
Protection Type and Direction Loss (dB)
Splitter Tx 4.05
Splitter Rx 1.35
Nonsplitter Tx 0.5
Nonsplitter Rx 0.5
Table 4-6 Optical Loss for Data Channels Through the OADM Modules
Type of OADM
Module
Trunk IN to Line Card
(Data Drop) in dB
1
1. The insertion loss is the worst case value so care should be taken when calculating minimum loss budget.
Line Card to
Trunk OUT (Data Add)
in dB
Trunk IN to Thru OUT
(Pass Through) in dB
Thru IN to
Trunk OUT (Pass
Through) in dB
4-channel with
OSC
4.1 4.1 1.5 1.5
4-channel without
OSC
4.1 4.1 1 1