newbei question about BCM 400 capacity 1

[johnathcc]

Please forgive the newbieness here:

As I understand the BCM 400's architecture, the base unit has 6 DS30 channels and 4 MBM bays. Each MBM takes roughly 1 DS30 channel (let's say each takes 1, to keep the math simple). Adding a BCM expansion module gives you 6 more MBM bays -- but it doesn't give you more DS30 channels, on the contrary it takes up a channel. So now you have an expanded system with 4 MBMs in the base unit, 1 MBM in the expansion module, and 5 bays in the expansion module that will probably be empty forever because you've run out of channels.

So I guess my question is: why is the BCM expansion module so big?

I would love to be wrong about this.

 

[option11newby]

The expansion does not utilise one of the DS30 buses.

The reason for the capacity to add up to 6 MBM's is down to the type of MBM you install.

ie.
BRIM MBM utilises a third of a bus (DS30), so you could have 3 BRIM MBM's still only using 1 DS30 bus

DTM = 1 DS30 bus
DSM16+ = half a DS30 Bus
DSM32+ = 1 DS30 Bus

It is all down to the offsets

Hope this helps

 

[acewarlock]

You could install 4 CTM8's mod and they would only use 1 BUS