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The Question is:
We are implementing Dark Fibre as a solution for a remote VMS cluster. What is
acceptable span loss for a VMS cluster?
The Answer is :
Dark fiber typically indicates that customer equipment is used with the
fiber-optic connection.
Please contact your fiber-optic communications device vendor for assistance
in correctly configuring the fiber-optic connection -- most fiber-optic
communications devices require a minimum required loss (variously measured
in dB), and this can be provided via sufficient cabling or via the
installation of appropriate attenuation filters.
Neither span loss nor in-line loss elements (attenuators) are features or
considerations of an OpenVMS Cluster configuration. The OpenVMS Cluster
software deliberately does not know nor does it particularly care about
the underlying connection -- the OpenVMS Cluster software only expects the
underlying communications to provide the specified latency and bandwidth.
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