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BCM50 6.0 Capacity 2

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curlycord

Programmer
Sep 22, 2002
14,231
Toronto, Canada
Do I understand right that it now supports a 2nd 32 port DSM on the 2nd exp cabinet for total of 76 max?

Also can you get a 32 X anything else? would assume not.
This means 76 sets with only 4 lines to call out on....so what was the purpose of 6.0 to allow for the 2nd 32?


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curlycord
 
Hi Curly,

With my SIP trunks, I have 12 SIP trunks for 12 simultaneous calls at once. Still not that many, but I can see your point if you have analog only trunks.

 
It's doubtful you'd even want 76 sets with so few PSTN trunks, so only point would be with VOIP trunks then break out to PSTN on the far end.

Just remember that the BCM 50 is limited to maximum 32 IP sets (system limit) AND there is a hybrid limit of 50 (this is where you combine digital sets & IP sets). Not sure whether the total number of trunks would factor into a hybrid limit.
 
Try looking at the latest "Configuration-System" PDF (available in operational collection. Looking at an old one I have dated May 2010, page 129 "System capacity reference" indicates:

Avaya BCM50
Capacity
Maximum TDM Set DNs that can exist in the system (Note:
DECT and Avaya 7406E Digital Mobile Handset are part of
the TDM set count) = 44

 
Ok, but I have install at least two BCM50 system that are working just fine with 2 expansion cabinets, one with a DTM and one with a DSM 32 AND 12 digital station keycodes activated. Plus the 4 analog stations. That makes 48. Do the analogs not count?

MRoberts
 
TDM = Time Divisional Multiplexing = digital (also referred to as BST (Business Series Terminals)). So analgoue does not count.
 
I think the overview sheet is deceiving noting 76 when really it might be including IP sets???.

Underneath that it states 80 TDM....which would include the 4 analogs no doubt as well.




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curlycord
 
Not with a limit of 50 on a hybrid system.

You've already said:
"Ok, but I have install at least two BCM50 system that are working just fine with 2 expansion cabinets, one with a DTM and one with a DSM 32 AND 12 digital station keycodes activated. Plus the 4 analog stations. That makes 48. Do the analogs not count?"
I don't see a problem with this. I don't see that you are installing two DSM32's here on the same BCM.

If all the sets are to be digital only, you could theoretically use both expansions with DSM32s, however that only leaves you with maximum 4 analogue lines on a regular 50 or 4 BRI lines on a 50b. This is never going to be enough.

 
So what your saying is the overview is correct and 76 T series sets or 2 X32 DSM's are now supported on 6.0.

In the past is was always 44 X 4 Analog.....I just cant find proper docs stating that 6.0 has now allowed for the extra 32 "whats new".

Everyone I have spoken with is confused by that chart.



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curlycord
 
I have also thought that for total "sets" means Analog, Digital and IP "sets.

Where with 1 DSM32, 12 digital stations, 4 analog and 12 IP sets would equal 60 "sets. Then with a DTM, you MIGHT have enough channels to run that many sets.

MRoberts
 
Curly

I think you've always had the ability to configure 64 digital sets on the 50. With a sufficient number of SIP trunks that shouldn't be a problem. The problem is that it doesn't have the DSP resources to support that many. By the way, if you include the four analog and 32 IP sets that would be a total of 100 sets. Quite a load for that tiny box. When I get back into the lab I'll try to configure that second DSM32+.
 
Oldestgeek is right.....you've always had the ability to put 2 DSM 32+ into a BCM 50. you have to look at it from a BUS perspective. The First DSM uses 5&6 and the second uses 7&8.

The fact is, it's not practical, which is why Nortel didn't document it.
 
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