[cisco-voip] video conferencing resources for 8945, 9951, 9971 phones

[Lelio Fulgenzi]

Thanks for this and the previous email. 

I noticed that when I added additional types and made it a heterogeneous class, the resource requirements jumped significantly. 

We have no bandwidth issues at this time, so I can use the highest setting without issues. The one question I had, and of course it might mean experimenting, if I have four phones set to VGA, does the phone require the DSPs to present the far side images on the phone? Does this change the settings?

Sent from my iPhone...

"There's no place like 127.0.0.1"

On May 2, 2012, at 4:35 PM, Jason Burns <burns.jason at gmail.com> wrote:

> Misspoke there. If you want different resolutions in the conference, then go with the heterogeneous type. As soon as you pick two different resolutions you automatically get the heterogeneous, 2 class. 3 resolutions is a 3 class heterogeneous, etc.
> 
> So for you the H.264 Homogeneous with VGA would allow you full video conferencing at max resolution (AND max bandwidth).
> 
> If bandwidth is a concern you can select a smaller homogeneous size for your conferencing profile and the phones should negotiate down to that size when they're in the conference.
> 
> If you have extra DSPs this is where you can use a heterogeneous conference and throttle down your remote users with locations bandwidth (lower the video kbps) and allow your users local to the CFB to use higher resolutions. This could also be used to avoid going to the lowest common denominator if some endpoints didn't support VGA.
> 
> -Jason
> 
> On Wed, May 2, 2012 at 4:21 PM, Jason Burns <burns.jason at gmail.com> wrote:
> Check out this link:
> 
> http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/feature/guide/Video-trans-conf.html#wp1054259
> 
> You have to know your endpoints and what frame and bit rates they support.
> 
> http://en.wikipedia.org/wiki/Common_Intermediate_Format
> 
> http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/phones/ps10451/ps11158/data_sheet_c78-649595.html
> 
> 8945 - 640x480 @ 30fps (VGA)
> 
> 9951 - also VGA
> 
> http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/phones/ps10453/ps10513/data_sheet_c78-565680.html
> 
> So you can get away with a homogeneous conference profile if that's all you're going to have. If you want to support some people in the conference at higher rates you'd want to go with the homogeneous setup. The doc explains the limits / benefits of each.
> 
> There are some really good tables in the first link to that explain the different formats. I don't know if I can easily summarize it!
> 
> -Jason
> 
> On Wed, May 2, 2012 at 3:23 PM, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:
> 
> I'd like to ensure (or at least try to ensure) that I have at least one or two video conferencing resources for a batch of 8945s and 9951s/71s that I have available for testing.
> 
> The options for video conferencing resources on the DSP calculator are quite vast (for someone who has no experience in video).
> 
> Anyone have any suggestions for the parameters?
> 
> Conference Type:Homogeneous (1 Class) /Heterogeneous (2,3,4 Classes)
> 
> Video Capabilities: H.264 XXX /H.263 XXX 
> 
> Types: ?
> 
> I'm guessing I could just check off all the video capabilities of the phones, but not sure what the classes are for. 
> 
> Would I need Video transcoders for this? Can I assume they'll all talk the same?
> 
> ---
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (ANNU)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Cooking with unix is easy. You just sed it and forget it. 
>                               - LFJ (with apologies to Mr. Popeil)
> 
> 
> 
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