 Architecture
The basic building block of the S-A element management
system is ROSA EM which is a rack mounted, 2 RU site
manager designed to monitor and control all of the
transmission equipment located at the site. This
includes the HFC outside plant optical nodes,
amplifiers, and power supplies that originate and/or
terminate from this site. High reliability is at the
core of the ROSA EM design. It uses the Linux operating
system on an embedded platform (flash drive) so there
are no moving parts that can break down. One ROSA EM is
placed at each headend, hub and remote site to manage
the equipment at the site. This is important because in
the event the communications link
between a ROSA EM site and the overall network
management system is lost, the network equipment will continue to be managed by the collocated ROSA EM
providing backup capability and alarm notification. ROSA
EM supports open standards interfaces, which enable
cost-effective integration of equipment into the ROSA
EM, as well as cost-effective integration of the ROSA EM
into upper-level network managers.
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