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Cisco Metro 1500 Series Hardware Installation Guide
78-10588-03
Chapter1 Product Overview System Modules
Thestatus of receivers and transmitters can be observed locally with SNMP-based
networkmanagement tools. In addition, the front panel LEDs provide information
on the operating status. Refer to the Cisco Metro 1500 Series Software
Configuration Guidefor more information about this feature.
For service purposes, data can be looped. The loop function is switchable using
the network management tools. A local loop connects the electrical output of the
local optical receiverwith the electrical input of the local optical transmitter. This
loop enables a test of the local transmission lines, the local receiver,and the local
transmitter.Locally arriving data is directly sent back. A remote loop connects the
electrical output of the optical receiverat the remote system to the electrical input
of the optical transmitter, so that the data sent to the remote system is directly
retransmitted to the local system. This loop enables a test of the remote
transmission lines, the MUX/ DMX pair, the remote receiver and remote
transmitter pair, and the remote system.
Data Rate Transparent WCMs
The following transparent WCMs are available:
•Low-speed transparent WCM that supports data rates of 100 to 200 Mbps.
•High-speed transparent WCM that supports data rates of 100 to 1250 Mbps.
These WCMs are protocol-transparent, and they support their data rates within a
guaranteed optical budget. Locally receivedoptical data enters the local receiver
and is electrically transferred to the remote transceiver. It transmits this data in
optical form at a certain ITU wavelength into the MUX, which sends the data to
thesystem at the other side of the link. There, the optical data enters first the DMX
and then the remote receiver of the system. The data then is electrically
transmitted to the local transmitter, which delivers the optical data.
Remotely received optical data from the paired WCMs enters through the DMX
into the remote receiverat a specific ITU wavelength. The data is then electrically
transmitted to the local transmitter, which delivers the optical data.
Youcan check the status of receivers and transmitters using the front panel LEDs
or with SNMP-based network management tools. For more information on the
available network management tools, refer to the Cisco Metro 1500 Series
Software Configuration Guide.