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Chapter 1 Product Overview
System Modules
1-16
Cisco Metro 1500 Series Hardware Installation Guide
78-10588-03
Wavelength Channel Modules
Table 1-2 lists the seven WCMs that are available for the Cisco Metro 1500 series
system, their part numbers, and their maximum remote receiver (R/R) input power
in decibels per milliwatt (dBm).
WCMs are used in pairs. Adding a channel to a communication link requires
adding WCMs of the same type and channel number at both ends of the link. The
available WCM types are either data rate transparent or they have clock recovery
through a fixed or a settable multiclock.
For reasons of laser safety requirements, the WCM is equipped with an automatic
laser shutdown (ALS), which reduces the optical output power of the remote
transmitter whenever a remote link is broken.
Table 1-2 Available WCMs
WCM Part Number
Maximum R/R
1
Input
Power
Low-speed transparent
with 100 to 200 Mbps
WCM/LS-T -5 dBm
2
High-speed transparent
with 100 to 1250 Mbps
WCM/HS-T -7 dBm
High-speed
with 622-Mbps clock
WCM/HS-FC622 -7 dBm
High-speed
with 1062-Mbps clock
for coupling link
WCM/HS-FC1062-CL -7 dBm
High-speed
with 1062- or
1250-Mbps clock
WCM/HS-MC1062/1250 -7 dBm
2.488 Gbps WCM-FC2488 -8 dBm
1. R/R = remote receiver
2. dBm = decibelsreferenced to1 mW —the standard unitof normalized powerlevel used inoptics,
where 0 dBm =1 mW, +10 dBm =10 mW.