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LBI-39224
3-47
Each NIM is assigned a unique site assignment number (1 thru 32)
within the CEC/IMC. This number corresponds to and matches the site
assignment number set via the 5-bit DIP switch setting on the interface
module’s Controller Board. A NIM may be either Audio Board
equipped or T1/E1 Interface Card equipped, both situations will be
discussed.
Multinode Configuration
For this discussion the term "multinode" will be synonymous
with distributed multisite network involving multiple IMC
networks connected together by Network Interface Modules
(NIMs).
Some additional configuration considerations are required when linking
two or more IMC networks together for multinode operation. The NIM
control data link between the IMC networks must be established prior
to NIM channel audio configuration. The NIM on each end of the link
must be manually set to equal baud rates; this is performed in the
StarGate / Remote CEC / NIM Configuration dialog box as
described in DISTRIBUTED MULTISITE / STARGATE
CONFIGURATION, beginning on page 3-141. Those nodes (IMC
networks) that will make-up the multinode system must have their
Group and Unit Databases downloaded from the System Manager. This
is accomplished by downloading the System Manager Group and Unit
Databases from the System Manager as discussed in SYSTEM
MANAGER DATABASE UPLOADS, beginning on page 3-14, and
may have already been accomplished during the course of normal
CEC/IMC configuration. At the very least the Group and Unit
Database download should be verified as being complete.
The CEC/IMC ID ("switch assignment number") must be set at the
MOM Controller Board before distributed multisite (multinode)
communications will operate correctly. The CEC/IMC firmware will
automatically display a CEC/IMC ID number even if one is not set at
the MOM; therefore, a displayed CEC/IMC ID does not guarantee that
the number has been set. Ensure that this switch assignment number
has been set using the DIP switches on the MOM Controller Board as
specified in the Distributed Multisite/StarGate Configuration section of
NOTE