Nortel Networks BCM200/400 - Manual (Page 164)

164 Chapter 9 Connecting the cables
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Changing configurations
Here are some points to consider when changing modules in existing or new BCM systems:
• Trunk and analog station MBMs cannot share a DS30 bus.
• MBMs that require more than one DS30 bus automatically assign the next bus in
chronological order. Therefore, if an existing installed MBM uses either of the required DS30
buses, remove the installed MBM. You must then assign the DIP switches for both MBMs so
there is no conflict between them or with any other installed MBM.
• The goal is to have a balanced mix of trunk and station MBMs.
• Write the DIP switch settings for each module in a place that is handy to reference when you
decide to change or add MBMs.
• If you update your Norstar system to a BCM system, your station amphenol connectors can be
connected into the MBMs without adjustment. Trunk connectors must be converted to RJ-11
(CTM) or RJ-45 (BRI) connectors. However, if you use the FEM to connect your Norstar
MBMs to the BCM system, the station wiring must be adjusted. Refer to
“Wiring the FEM” on
page 156 .
System setup
Use Table 59 to make a note of your basic system setup. Post this page near the BCM hardware for
future reference.
Table 59 System setup summary
DS30 bus 2 DS30 bus 3 DS30 bus 4
Media bay module
Dip switch setting
Line/set type
Line/Loop/DN range
DS30 bus 5 DS30 bus 6 DS30 bus 7
Media bay module
Dip switch setting
Line/set type
Line/Loop/DN range