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Dip Switch Settings on new BCM 400 Rls 4.0 1

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fortworth2323

Technical User
Aug 15, 2007
3
US
Seeing if someone can hold my hand on this one. I have a brand new BCM 400 Rls 4.0 with an 1000e expansion unit. My Media Bay Modules are: (2) DTMS, (2) DSM 32+, and (1) GASM8. There will be no IP functionality so it looks like I can keep it at a 2/6 Split. I am concerned about the exansion unit and how it relates to my buses. Could someone recite the best setup for me (What BUS you would assign each MBM to). If possible, I would be overly thrilled if someone could spit out the dip switch settings as well. Just want to make sure that I get this correct for I cannot have any future problems. Thank you in advance.
 
Let me re-phrase. I know how to obtain the dipswitch settings via the books, but my question is: Do I set all (5) MBM's to Offset 0? Is there anything wrong with that? Or do I have to spread out the Offsets to 0, 1, 2? In addition, I was thinking about setting my two DSM32+ to Double Density (Using Bus 2 for one and Bus 3 for the other). Then use Bus 6 for one DTM and Bus 7 for the other. This of course would only work on a 2/6 Split which I will have. Then I can set my GASM8 to let's say Bus 4. If that is ok, my main question would be can I keep all on Offset 0. Don't understand Offsets and if there are any repercussions with keeping all 5 MBM's on the same offset.
 
The expansion unit doesn't relate to the buses at all. It simply gives you more bays to put media bay modules into. It is the dip switches that assign a module to whatever bus and offset.

DTM #1 - Bus 7 offset 0 - switches 4 and 6 off the rest on.
DTM #2 - Bus 6 offset 0 - switch 4 off the rest on.

DSM32+ (that's always double density. Single density doesn't exist on 4.0 software)
DSM32+ #1 - Bus 2 offset 0 - swith 1 off the rest on
DSM32+ #2 - Bus 3 offset 0 - switches 1 and 6 off the rest on.

GASM - Bus 4 offset 0 - switch 5 off the rest on.

MRoberts
 
Thanks Mroberts.....I really appreciate the help. So it looks like everything can be on Offset 0, correct?
 
Just because of the type of module that you are using.... DSM32+ modules consume one whole bus by itself (or four offsets). Same with the DTMs. They take up a whole bus by themselves or four offsets.

If you had a DSM16+, for instance, it takes up two offsets. So you could put two DSM16+ modules on one bus. The first one would go on offset 0 and the second would go on offset 2.

MRoberts
 
i had a 'related' question ...so i'm jumping onto this thread.

BCM4.0 ignores the first 3 dip switches (as indicated by the module settings in element manager)

I have second hand info - about this problem on a DSM32+ (switch settings xxx110)- System was upgraded from 3.7
the TNs are showing up 301-316 and 401-416

Is this possible - or could that be a dsm32?
 
It is because it was an upgraded system. That does happen. Remember with the MICS systems? When you upgrade to 7.0 and open up ports 13 & 14 on the second 6 port card, the extension numbers were all screwy.

Same thing here. If you have a brand spanking new 3.7 then the extensions would be 301-316 and 317- 332.

Just go in and do a change DN if it bugs the customer.

MRoberts
 
I remember reading about the extension numbers too ..
but these were port numbers ...

Sorry for not being clear, let me try differntly ...
1 DSM32+ is showing 16 extensions on bus 3 and 16 extensions on bus 4 - FDD is apparently not taking effect
 
You might also want to consider of putting only one DSM32 on the expansion , and the rest of MBM on the main unit .
That way if you need to do a remote system reboot due to some reason, it will bring down the T1 nicely .

It is very odd that Nortel still use dip switch to assign to buses on BCM400. And max out the system at 6 buses ?

I was force to go with Cisco CM on many cases because of this seemed to be very artificial limitation :)

Can't wait for "bigger" BCM from Nortel
 
Try looking at the Full Double Density settings:

1. Click on the Keys beside BCM and diagnostics.
2. Click on MSC.
3. On the top menu, click on Configuration and select Double Density mode.
4. When the dialog box comes up, click the the drop down menu and choose Full Double Density.

Then test. If it still has issues, reboot.

MRoberts
 
sorry it took this long to get back to you

Checked and it does show up as Full D/D ... will have to setup a time for a reboot with the client and will let you know how it goes
 
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