[cisco-voip] Phone limits per server

[Wes Sisk]

We have transitioned away from the 'device units' approach that used to 
be in the SRND.  When we were using that model the multiples were 
something like:
phone with 1 line at X BHCA = 1 unit
monitoring that phone via CTI = 4 units
registering a CTI device such as CTI route point = 8 units

Note, these are approximations.  The information is still available in 
older SRNDs. Unfortunately that model did not scale very well thus the 
move to the new capacity calculators.  The big challenge now is that CM 
does not generate simple concise values to plug into the calculators.

/Wes

On Wednesday, March 10, 2010 9:47:48 AM, Lelio Fulgenzi 
<lelio at uoguelph.ca> wrote:
> When you say massive performance hit, what do you mean? Just a rough 
> guess.
>
> Case in point, we have Unity Express boxes, IPCCx boxes. Does each CTI 
> port shave the load capacity down by 100 phones or something?
>
> We also have a Cistera appliance that uses CTI super provider to 
> monitor all 8000 phones or so.
>
>
>
> ---
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Cooking with unix is easy. You just sed it and forget it.
>                               - LFJ (with apologies to Mr. Popeil)
>
>
> ----- Original Message -----
> From: "Wes Sisk" <wsisk at cisco.com>
> To: "Jeremy Rogers" <Jeremy.Rogers at ip-soft.net>
> Cc: cisco-voip at puck.nether.net
> Sent: Wednesday, March 10, 2010 9:42:53 AM GMT -05:00 US/Canada Eastern
> Subject: Re: [cisco-voip] Phone limits per server
>
> SRND is 'guidance'.  The most respected source today are the capacity 
> calcaulators which are currently only accessible to partners:
> http://tools.cisco.com/cucst
> http://www.cisco.com/cgi-bin/CT/PGWCT/ct.cgi
>
> Maximum load is determined by devices, number of lines, and features 
> being invoked.  Anything using CTI is still a massive performance hit.
>
> Net: it is not as simple as server X supports Y devices.
>
> /Wes
>
> On Wednesday, March 10, 2010 9:02:05 AM, Jeremy Rogers 
> <Jeremy.Rogers at ip-soft.net> wrote:
>
>     According to the SRND for 6.1 you can have a max of 7500 phones on
>     a 7845, however in side discussions Ive heard mention that this
>     should be limited to no more than 4000 phones on a server in large
>     deployments.  Is that the case and is there documentation to back
>     it up?
>
>     Also, since each gateway endpoint is a “device”  is there a major
>     weighting difference between FXO/FXS endpoints and PRI endpoints
>     for capacity planning?
>
>      
>
>     Jeremy Rogers
>
>     Network Management
>
>      
>
>      
>
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>
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>
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