Visara CCA-3074 Planning Guide - Manual (Page 17)

CCA-3074 Planning
707159-002 2-3
Coax Terminal Requirement: The CCA-3074 does not support
an onboard coax interface but uses an optional external Coax
Subsystem (the CSS32). The external Coax Subsystem connects
to the CCA-3074 using IP communications through an Ethernet
interface. The external Coax Subsystem can be located nearby
and use a simple Ethernet crossover cable, or can be connected
remotely through an IP network. The direct attachment through
an Ethernet crossover cable is the preferred method, for two
reasons. 1) The CSS32 does not support SSL encryption natively,
making attachment to a network more of a security issue than a
direct attachment would be. 2) By not attaching to your network,
the CSS32 should provide reliable connectivity even when you
have network problems.
StorageTek LMUs: STK LMUs require a coax interface to
communicate with the CCA-3074 through the external CSS32
Coax Subsystem described above. The CCA-3074 does not
communicate to the STK LMU through an Ethernet (IP)
connection.
IBM 3290: The IBM 3290 plasma display is DFT/DSL coax
display commonly used in computer rooms for displaying up to
four console sessions simultaneously. DSL terminals require that
the controller they are attached to be capable of downloading a
code set into them. The CSS32 coax subsystem may not support a
3290 properly. It is possible to replace the 3290 product with
another Visara product (the 500Lx product that is capable of
supporting up to 10 sessions. With the 500Lx it is possible to
configure it for four sessions and display all four sessions on a
flat panel display in much the same manner as a 3290. Note that
the 500Lx supports 4 color and 7 color displays as compared to
the orange plasma monochrome of the 3290. It is also possible to
configure the 3290 to display only orange characters if it is really
desired.
Redundant Console Controllers: Most mainframe console
environments require redundant consoles attached through
redundant controller platforms to provide DR capabilities. This
means duplication of the minimum platform requirement. Note
that if your coax requirements are minimal, it is possible to drive
a single CSS32 Coax Subsystem from two (or more) CCA-3074s.