Specifications

4-7
Cisco ONS 15530 Planning Guide
OL-7708-01
Chapter 4 Optical Loss Budgets
Optical Loss for PSMs
Loss for the OSC
Table 4-7 shows the optical loss for the OSC between the OSC module and the OADM modules.
Optical Loss for PSMs
The PSM attenuates the trunk signal as it passes between the trunk fiber and the OADM module, ITU
trunk card, or transponder line card. Table 4-8 shows the optical loss for the channels passing through a
PSM.
Client Signal Latency on Aggregation Card
The process of aggregating client signals on the ESCON aggregation card and the 8-port FC/GE
aggregation card adds latency between the client equipment in the network.
ESCON Aggregation Cards
The ESCON aggregation card adds latency to ESCON traffic. The amount of latency depends on how
traffic is configured on the node. Table 4-9 shows the ESCON latency values for different configurations
of the ESCON aggregation card.
Table 4-7 Optical Loss for the OSC Through the OADM Modules
Type of OADM Module
Trunk IN to OSC Transceiver
(dB)
OSC Transceiver to Trunk OUT
(dB)
4-channel OADM with OSC 2.8 2.8
Table 4-8 Optical Loss for Channels Passing Through PSMs
Direction Minimum Loss (dB) Maximum Loss (dB)
Transmit 2.7 3.7
Receive 1.7
Table 4-9 Latency for ESCON Aggregation Cards
Traffic Mix in the ITU Wavelength Latency (in microseconds)
ESCON only 8.5
ESCON and FC 8.5
ESCON and GE 17