Chapter1 Product Overview
System Modules
1-16
Cisco Metro 1500 Series Hardware Installation Guide
78-10588-03
Wavelength Channel Modules
Table1-2 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
availableWCM 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.
Table1-2 Available WCMs
WCM Part Number Maximum R/R1 Input
Power
Low-speed transparent
with 100 to 200 Mbps WCM/LS-T -5 dBm2
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= decibels referenced to 1 mW — the standard unit of normalized power level used in optics,
where 0 dBm =1 mW, +10 dBm =10 mW.