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

Thu May 3 01:26:07 EDT 2012

Looks like as long as I'm doing video switching only with a homogeneous environment, I'll be safe. 

Anything else, I likely won't even have the spare resources to test. 

from:

http://www.cisco.com/en/US/prod/collateral/voicesw/ps6790/gatecont/ps4952/qa_c67-649850.html

Q. Which PVDMs can I use for video conferencing services on the Cisco ISR G2?
A. Only PVDM3 can be used for video conferencing services on the Cisco ISR G2. Further within the PVDM3 family only the - PVDM3-128, PVDM3-192, and PVDM3-256 - can be used for video mixing. However, all PVDM3 can be used for video switching.
Note: PVDM2 modules do not support video conferencing services.

Q. What video conferences are supported?
A. Three types of video profiles are supported: homogeneous conferences (video switching), heterogeneous conferences (video mixing), and guaranteed audio conferences (best-effort video).

Sent from my iPhone...

"There's no place like 127.0.0.1"

On May 2, 2012, at 11:05 PM, Nick Matthews <matthnick at gmail.com> wrote:

> Can't say there.  I do know that generally once channels are allocated they won't move.  So the question is if it will begin to allocate channels to the smallest DSPs first or not, to which I would not be surprised if it did work like that.  I've not been privy to the allocation magic of the PVDM3's, so it would be a cool test if you've got the ability.
> 
> -nick
> 
> On Wed, May 2, 2012 at 9:57 PM, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:
> Thanks, I'll have to check that out. 
> 
> I have a 256 + 64 installed. Would the system be 'smart' enough to use the 256 chip for video calls? Or would it depend on how the resources were reserved for the T1 calls? Would there be any benefit to installing the 64 chip in slot 0 so it's resources we're reserved for the T1s first, leaving more resources on the 256 free for video?
> 
> 
> Sent from my iPhone...
> 
> "There's no place like 127.0.0.1"
> 
> On May 2, 2012, at 9:43 PM, Nick Matthews <matthnick at gmail.com> wrote:
> 
>> Last time I looked, the lowest PVDM3 that supported video was the 128.  It's worth double checking, it caught me by surprise when I heard that.  The PVDM3's are good because you don't need to drop $100k on a MCU to get started.  There's also Callway and others are hosted services that partners offer that you can pay-as-you-need or pay-as-you-use.
>> 
>> -nick
>> 
>> On Wed, May 2, 2012 at 8:59 PM, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:
>> 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)
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> cisco-voip mailing list
>>> cisco-voip at puck.nether.net
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>>> 
>>> 
>>> 
>> 
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