Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL Electronics IMUX Ap-Note 15.
INITIAL PROGRAMMING OF REMOTE CHANNEL
MODULES.
Channel Modules operating under remote control use configuration
information stored in Common Module's Chart. There are two obvious
methods of entering such configuration into the Chart:
Initial operation in Local Mode.
When a "smart" module is set - even briefly - to local control mode,
the Common Module will read its DIP-switches and store the
configuration in the Chart. Subsequently, the Channel Module can be
switched to remote control. The DIP-switches will be ignored from
now on and the configuration can be modified remotely.
Remote programming.
A complete configuration parameter set can be prepared and sent to
the Channel Module by Network Management System (NMS). Until
this data is received, the Channel Module will be in a not-programmed
state.
It is important to note that if the local/remote mode switch on a Channel
Module is moved to local control mode even momentarily, the DIP-switch
settings will be accepted by the Common Module and will overwrite any
previous remote configuration settings. Therefore, this switch should be
operated very judiciously to avoid loading undesired configuration
parameters.
Some users recommend setting DIP switches to desired configuration even
if remote control is used, in order to prevent problems caused by
inexperienced operators. This way, changing the position of mode switch
will not change the configuration.
REMOVING CHANNEL MODULES - "ALERT AT CARD".
The Common Module continuously scans shelf backplane. Information about
any detected Channel Modules is written into the Chart.
If a scan reveals that a previously operating module is not present, an
"Alert at Card" is issued. This notifies the user of DS0-level problems.
When a Channel Module is removed intentionally, it should be first set to
"SERVICE OFF". An out-of-service card can be removed without causing
"Alert at Card".
apnote15 page: 4 of 8 rdw revised 08/30/2001 printed 11/1/2006
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