Lelio,
Jabber has been using something call CPVE for a while; Cisco Precision Video Engine. CPVE comes from the Tandberg acquisition and was mainly used in Tandberg Movi (later Jabber Video). CPVE indeed starts at a low quality bitrate and then assesses the network using RTCP and other technologies to up-scale and down-scale as needed. You stated your requirement in your initial email - "i'd like to make sure we have the best video quality while on-campus". While it's fine to assume that over 3G/4G video may be disabled or perhaps a low bandwidth, what about MRA clients using home or cafe WiFi? If said WiFi has a fast bandwidth e.g. 50 Mbps and your Jabber MRA device calls an on-prem video device, you have no control over the bandwidth. The idea behind Device Mobility is quite simple, for your case you could do it like this; - Create a Device Pool named Internet_DP - Create Internet_RG region and assign Internet_RG to Internet_DP (Internet_RG has region relationships to your on-campus regions limiting the bandwidth e.g. 512 Kbps max video) - Create a Physical Location Internet_PL and Device Mobility Group Internet_DMG and assign both to Internet_DP - Create a Device Mobility Info (basically a subnet) called Internet_DMI and give it the IP of your Expressway-C with subnet mask of 32 e.g. 10.10.10.100/32 - Associate Internet_DP with the Internet_DMI - Enable Device Mobility from CallManager Service Parameters (enabled Device Mobility for all phones) or enable on a per-phone basis via BAT or individually What happens now is that anytime a BOT/TCT/TAB/CSF/78XX/88XX phone registers via Expressway, it's registration IP will always be the IP of Expressway-C. CUCM realizes this and essentially changes the DP to Internet_DP where you have defined your lower bandwidth region relationships. Once that device comes back to the corporate network it will no longer have a registration IP of the Expressway-C, rather a normal DHCP IP and will of course use the normal Device Pool which you configured which may have a maximum BW of 10 Mbps. Hope this helps! On 2016-04-07 00:05, Lelio Fulgenzi wrote: > I honestly don't know. > > I'm new to the whole Jabber world, as well as to video codecs and bit rates. > > I could be worrying about something that I don't need to be, i.e. a 10 minute > Jabber video call will never use more than X megabytes of data. > > Then again, it's only a matter of time until clients will want to use the > quality that comes with a mobile phone front facing camera to have a HD video > call from anywhere. > > --- > Lelio Fulgenzi, B.A. > Senior Analyst, Network Infrastructure > Computing and Communications Services (CCS) > University of Guelph > > 519‐824‐4120 Ext 56354 > le...@uoguelph.ca > www.uoguelph.ca/ccs > Room 037, Animal Science and Nutrition Building > Guelph, Ontario, N1G 2W1 > > ------------------------- > > FROM: "Dennis Heim" <dennis.h...@wwt.com> > TO: "Lelio Fulgenzi" <le...@uoguelph.ca>, cisco-voip@puck.nether.net > SENT: Wednesday, April 6, 2016 10:00:11 AM > SUBJECT: RE: [cisco-voip] bandwidth restrictions for MRA clients - necessary > or not? > > Can many mobile jabber devices with cellular connectivity do more than 360p? > > FROM: cisco-voip [mailto:cisco-voip-boun...@puck.nether.net] ON BEHALF OF > Lelio Fulgenzi > SENT: Wednesday, April 06, 2016 9:53 AM > TO: cisco-voip@puck.nether.net > SUBJECT: Re: [cisco-voip] bandwidth restrictions for MRA clients - necessary > or not? > > Thanks Eric. > > I had a similar discussion with a Cisco engineer. Basically, let Jabber > figure things out. Which is all fine and dandy, until you read that Canada > pays some of the highest fees for mobile data in the world. lol. > > There are not many unlimited data plans available, and a simple 10 minute > video call at 10mbps (using 5mbps for calc) could probably use up 3gb of data > traffic. > > But then, I don't want to impact quality for Jabber clients on wifi > connections. > > I'm guessing that I might go with leaving device mobility out of the picture > for now and ensuring video calling is disabled while on mobile networks. > > ------------------------- > > FROM: "Eric Pedersen" <peders...@bennettjones.com> > TO: "Lelio Fulgenzi" <le...@uoguelph.ca>, cisco-voip@puck.nether.net > SENT: Monday, April 4, 2016 11:00:36 AM > SUBJECT: RE: [cisco-voip] bandwidth restrictions for MRA clients - necessary > or not? > > Jabber apparently monitors packet loss and sets the video rate accordingly, > which is why the quality starts out really low and them improves with the > call. I don't think any of the phones do that, but I believe the 8845 maximum > bandwidth is 2mpbs. > > FROM: cisco-voip [mailto:cisco-voip-boun...@puck.nether.net] ON BEHALF OF > Lelio Fulgenzi > SENT: 04 April 2016 7:40 AM > TO: cisco-voip@puck.nether.net > SUBJECT: [cisco-voip] bandwidth restrictions for MRA clients - necessary or > not? > > quick question... how are people restricting the video/audio bandwidth for > Jabber MRA clients or physical phone MRA clients for that matter? > > we have not had to use locations or enabled mobility (i think that's the IP > Address based feature) since we have high speed, low latency WAN links to our > locations. > > is it even a problem that I need to consider? > > i'd like to make sure we have the best video quality while on-campus > (including those connected via high speed WAN links), so i've set the default > bw to 10mbps. > > i'm wondering how that will impact MRA clients. > > --- > Lelio Fulgenzi, B.A. > Senior Analyst, Network Infrastructure > Computing and Communications Services (CCS) > University of Guelph > > 519‐824‐4120 Ext 56354 > le...@uoguelph.ca > www.uoguelph.ca/ccs [1] > Room 037, Animal Science and Nutrition Building > Guelph, Ontario, N1G 2W1 > > The contents of this message may contain confidential and/or privileged > subject matter. 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