Re: [on-asterisk] Conference bridge
I should say that I'm approaching this from first principles and not from any practical knowledge. So this is probably not of interest to Rachel. But I do find the problem interesting. | From: Jim Van Meggelen j...@vanmeggelen.ca | If memory serves correctly, the conference mixer doesn't have to mix all | incoming audio, but rather only has to mix relevant audio (i.e. figure out | who's talking, and take that single audio stream and send it out to all the | participating channels). One challenge I would expect would be figuring out | the noise threshold (i.e. what is talking and what is just background noise), | and knowing to quickly enable a channel when somebody is speaking. A good | mixer should be able to handle more than one person speaking, but since for | the most part people can only handle one person talking at a time, if the | mixer is good, it doesn't have to work so hard at that. You also asked whether the problem was to handle M conferences of M people (where perhaps M * N = 1000) or one conference of N people (where N = 1000). A very good question. In a face to face conference, people behave differently as the number of participants increases. In particular, speaker selection gets to be more and more formal because the problem gets harder to solve. Things don't get easier with telephone conferencing: - some out of band signals are lost - eye contact, gaze - standing, sticking hand in the air - designation by chairperson - leaning over and whispering to a neighbour - some signals are degraded - only some frequencies are carried and the accuracy is reduced - dynamic range is reduced (speaking up works in real conferences but not nearly as well over a phone) - even modest time delays confuse informal conversational protocols - (with current systems) localization clues/cues are lost. The human ear can tell (with some ambiguity) where a sound comes from. This turns out to help quite a bit in understanding what is going on with several auditory things going on at once. I don't immediately see how a largish conference can be run as anything other than broadcasting by a single speaker or a small number of speakers designated manually. As a thought experiment, consider how one can hear a speaker in a lecture even over coughing. I don't see that working in a telephone conference with all mikes open. | I suspect the math involved is pretty complex, though. Math I can handle (perhaps). What I don't know are the practical considerations. The psycho-acoustics are not obvious. | This also gets me wondering if multiple, discreet conferences eat up more | horsepower than a single conference would, even with a large number of | participants. I imagine that small conferences would be more amenable to automatic solutions and hence could take more processing (per participant) than large conferences when simple designation must be used. I have no idea what the thresholds would be. I don't even know how many different strategies there would be (i.e. how many thresholds). | I suspect there's a lot more to it than that, though. Agreed. - To unsubscribe, e-mail: asterisk-unsubscr...@uc.org For additional commands, e-mail: asterisk-h...@uc.org
Re: [on-asterisk] Asterisk On Intel Celeron 1.6 GHz Processor
Simon Henry , Thank you for the information
Lloyd
On Sat, Feb 28, 2009 at 2:27 PM, Henry L.Coleman aster...@voip-pbx.cawrote:
Usually the simultanious call rate is limited by the upload bandwidth of
the
DSL or Cable ie. a 640k upload speed would in handle 10 x 64k (g711)
channels. In practice
however 8 channels is more realistic.
Your hardware can easily handle this. I have heard that you should be able
to handle
40-50 simultanious calls but since hardware is so cheap if you need that
kind of capability you should be
looking to upgrade to 3.0 Ghz processor at least.
Onboard cards TDM 400 etc. will hit performance quite hard since they sit
on the PCI bus gobbling
interrupt requests for clock timing.
I'm sorry if this is still a bit vague but there are such a lot of
variables,
only a general ball park answer is possible.
My philosophy is build it, test it till it breaks and then if required
remove the HD and place it in a
more powerful machine.
=
Henry L.Coleman [www.VoIP-PBX.ca]
Tel: 647-723-5160 Ext.203
=
{ Aloysius Thevarajah Lloyd}
Hello,
Can you share the Experience Asterisk On Intel Celeron Processor.
*I am thinking a Intel Celeron 1.6 GHz and 1GB Memory*
- How Many Simultaneous Calls it handle?
-Trans Coding g711-g729 ?
Thank you.
Lloyd
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Re: Re: [on-asterisk] SIG - TAUG Demonstration System
Count me in. Please let m know the time and date. Lloyd On Sat, Feb 28, 2009 at 9:10 PM, iguana...@gmail.com wrote: I am in too. Any idea on time and place?
Re: [on-asterisk] Fwd: trunk utilization
Hi Henry, I realized that after I asked it. But you nailed it, I was not so
much looking for how many trunks or ports (ie: erlang / poisson) but moreso
with a single SIP termination point how many actual 'call minutes' per day
would be consumed (in and out).
Yours is helpful and is similar to some manual modeling that I did looking
around at CDR reports.
Curious, how many 'SIP ports' did you provision for this?
In my world, that I am trying to determine is costing models, should I go
with per trunk pricing to an SIP trunk provider to go with metered
origination. In your scenario, looks like metered would make more sense.
Down here (Buffalo) I have access to either metered or per trunk call
termination.
Curious, what do you typically provision? Standard PSTN analogue or digital
PRI or SIP ISTP ports?
Again, thank you.
B
On Sat, Feb 28, 2009 at 12:05 PM, Henry L.Coleman aster...@voip-pbx.cawrote:
Hi Bob,your question is a bit like asking how long is a piece of string?
Anyway, one of my clients (a lawyer) is about the size that you state in
your question.
So here are the results:
147 calls per weekday (average)
270 minutes per day (peaks at 10am and 3 pm)
=
Henry L.Coleman [www.VoIP-PBX.ca]
Tel: 647-723-5160 Ext.203
=
{ birchstr...@gmail.com}
Hi there, would anyone care to offer up an opinion on what you would deem
to
be typical call usage minutes on a trunk? It is for a termination
utilization calculation (not a call centre, just a typical enterprise
customer) with 8 or 9 x 5 business hours operating on a 5 day week.
Curious if anyone could provide an opinion.
Origination (In bound):
Termination (Out bound):
Could be either on a per trunk or per user basis. I am about to make a
guess, and I would appreciate a second or third viewpoint.
Any input would be appreciated !
Bob Smith
birchstr...@gmail.com
-
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[on-asterisk] Comwave Callback and Similar
Hello Everyone, In the past few months Comwave has been advertising about a sort of CALLBACK/DISA combination for $20/month. Can anyone speculate as to what sort of equipment/solution they use to achieve their goal? Even if they sign up 100k clients that is still a lot of calls knowing every call is actually two calls going through their system and then bridged. Do they use an Asterisk SER farm? Do they use some propriety equipment like VPS, MERA, etc...? Listed: http://www.comwave.net/mobile/ Thanks, Bruce _ Share photos with friends on Windows Live Messenger http://go.microsoft.com/?linkid=9650734
RE: [on-asterisk] Comwave Callback and Similar
Bruce: I certainly can't speak to what Comwave is using specifically, but there are many platforms out there that can offer this type of service (including Asterisk). Bill -Original Message- From: Bruce N [mailto:het...@hotmail.com] Sent: Sunday, March 01, 2009 6:40 PM To: asterisk Mailing Subject: [on-asterisk] Comwave Callback and Similar Hello Everyone, In the past few months Comwave has been advertising about a sort of CALLBACK/DISA combination for $20/month. Can anyone speculate as to what sort of equipment/solution they use to achieve their goal? Even if they sign up 100k clients that is still a lot of calls knowing every call is actually two calls going through their system and then bridged. Do they use an Asterisk SER farm? Do they use some propriety equipment like VPS, MERA, etc...? Listed: http://www.comwave.net/mobile/ Thanks, Bruce _ Share photos with friends on Windows Live Messenger http://go.microsoft.com/?linkid=9650734 - To unsubscribe, e-mail: asterisk-unsubscr...@uc.org For additional commands, e-mail: asterisk-h...@uc.org
Re: [on-asterisk] Fwd: trunk utilization
In this case local outgoing calls would first be routed through the analog
lines and then onto
voip lines if busy. All outgoing LD and International calls go out on a voip
line(s).
One of the beautiful things about VoIP lines is that they can handle more than
one call at a time
(in my case 5). To obtain the same erlangs rating you would need 5 x
(equivalent)analog business lines,
an expensive proposition!
H
-
Henry L. Coleman
[VoIP-PBX.ca]
=
{ birchstr...@gmail.com}
Hi Henry, I realized that after I asked it. But you nailed it, I was not so
much looking for how many trunks or ports (ie: erlang / poisson) but moreso
with a single SIP termination point how many actual 'call minutes' per day
would be consumed (in and out).
Yours is helpful and is similar to some manual modeling that I did looking
around at CDR reports.
Curious, how many 'SIP ports' did you provision for this?
In my world, that I am trying to determine is costing models, should I go
with per trunk pricing to an SIP trunk provider to go with metered
origination. In your scenario, looks like metered would make more sense.
Down here (Buffalo) I have access to either metered or per trunk call
termination.
Curious, what do you typically provision? Standard PSTN analogue or digital
PRI or SIP ISTP ports?
Again, thank you.
B
On Sat, Feb 28, 2009 at 12:05 PM, Henry L.Coleman aster...@voip-pbx.cawrote:
Hi Bob,your question is a bit like asking how long is a piece of string?
Anyway, one of my clients (a lawyer) is about the size that you state in
your question.
So here are the results:
147 calls per weekday (average)
270 minutes per day (peaks at 10am and 3 pm)
=
Henry L.Coleman [www.VoIP-PBX.ca]
Tel: 647-723-5160 Ext.203
=
{ birchstr...@gmail.com}
Hi there, would anyone care to offer up an opinion on what you would deem
to
be typical call usage minutes on a trunk? It is for a termination
utilization calculation (not a call centre, just a typical enterprise
customer) with 8 or 9 x 5 business hours operating on a 5 day week.
Curious if anyone could provide an opinion.
Origination (In bound):
Termination (Out bound):
Could be either on a per trunk or per user basis. I am about to make a
guess, and I would appreciate a second or third viewpoint.
Any input would be appreciated !
Bob Smith
birchstr...@gmail.com
-
To unsubscribe, e-mail: asterisk-unsubscr...@uc.org
For additional commands, e-mail: asterisk-h...@uc.org
-
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RE: [on-asterisk] Comwave Callback and Similar
Hello Bill, Thanks for the feedback. Can you be a bit more specific please? What sort of solutions are out there that you may think do good with let's say 20,000 simultaneous calls. I am assuming the many different platforms that you mention are not a single switch but a collaboration of several different equipments that make this possible?! I am really interested in hearing about a successful case even if it involves an Asterisk/SER farm sort of thing. But rather like to hear of platforms that are proven to work and are made for the specific reason. Not looking to spend many many hours on developing a solution from scratch at all. Need to know specifics of the equipments. Thanks, Bruce From: b...@telnetcommunications.com To: het...@hotmail.com; asterisk@uc.org Date: Sun, 1 Mar 2009 19:37:08 -0500 Subject: RE: [on-asterisk] Comwave Callback and Similar Bruce: I certainly can't speak to what Comwave is using specifically, but there are many platforms out there that can offer this type of service (including Asterisk). Bill -Original Message- From: Bruce N [mailto:het...@hotmail.com] Sent: Sunday, March 01, 2009 6:40 PM To: asterisk Mailing Subject: [on-asterisk] Comwave Callback and Similar Hello Everyone, In the past few months Comwave has been advertising about a sort of CALLBACK/DISA combination for $20/month. Can anyone speculate as to what sort of equipment/solution they use to achieve their goal? Even if they sign up 100k clients that is still a lot of calls knowing every call is actually two calls going through their system and then bridged. Do they use an Asterisk SER farm? Do they use some propriety equipment like VPS, MERA, etc...? Listed: http://www.comwave.net/mobile/ Thanks, Bruce _ Share photos with friends on Windows Live Messenger http://go.microsoft.com/?linkid=9650734 - To unsubscribe, e-mail: asterisk-unsubscr...@uc.org For additional commands, e-mail: asterisk-h...@uc.org _ Experience all of the new features, and Reconnect with your life. http://go.microsoft.com/?linkid=9650730
RE: Re: [on-asterisk] SIG - TAUG Demonstration System
Count me in also. -Original Message- From: iguana...@gmail.com [mailto:iguana...@gmail.com] Sent: February-28-09 9:10 PM To: Simon P. Ditner; asterisk@uc.org Subject: Re: Re: [on-asterisk] SIG - TAUG Demonstration System I am in too. Any idea on time and place? - To unsubscribe, e-mail: asterisk-unsubscr...@uc.org For additional commands, e-mail: asterisk-h...@uc.org
