There is also an Ethernet/SIP overhead speaker. Voipsupply sells it.
On 3/2/07, Stefano Totaro <[EMAIL PROTECTED]> wrote:
Quite surprising, yes! :-) I am from north east Italy, now I live in Verona (Romeo and Juliet's city :). I cannot do it connecting amp to the PBX. I have quite a long distance to cover and a network is already there. My "phones" are have a quite smart processor so we may probably run the ices2 that you are suggesting or something similar. I will check the links that you sent me. Thanks, Stefano >Stefano Totaro, > >Off topic. I just noticed your name and was a little surprised!? ;-) >Are you in Italy / Sicily? > >Anyways, you can achieve overhead paging through a sound card hooked to >an Amp and speakers from your PBX. I have yet to do it but have read >about it. I think this may be the better solution for you unless you >are set on doing it over IP. > >Check here for several options >http://www.voip-info.org/wiki/view/Asterisk+Paging+and+Intercom > >I am pretty sure if you use a ring group or meetme, there is no way >around each phone having it's own stream. > >Interestingly, 3Com systems do conferencing and paging through multicast >which is a nice idea but in practice can be a real pain to configure >network components to work properly (especially if you do not control >the network or you are trying to implement paging between remote >offices). I have spent hours on this exact problem in the past. > >If it were me, I would probably not want all that traffic on the PBX >unless that is all that it will be doing or if you go the sound card >route. I would use ices2 and let everyone stream from a different >server than the PBX. > >Since you are using phones, I do not know that ices2 would work for you, >something must initiate the call. I would probably have a second >Asterisk box to just handle the paging, setup an extension the dialplan >of the main PBX to dial the paging machine via SIP (and possibly include >Authenticate) that would drop the call into something like this: >http://www.voip-info.org/wiki/index.php?page=Asterisk+cmd+page > >Thanks, >Steve Totaro > > > >>stefano.totaro at transport.alstom.com wrote: >> >> Hello Steve, >> thanks for your anwer. >> Yes, you are right we want to do VoIP telephone system capable also of >> "public address" (overhead paging) service. >> So synchronization is a key issue if we want to avoid unpleasant effects. >> We are designing our phones and they will have also onboard amplifiers. >> What I am trying to understand is whether we may use the phone system >> also for this service or if it is better >> to go for a specific streaming technology (Ices2 is a good suggestion >> thanks). >> >> What happen if I put all the phones in a ring? Do they join the same >> multicast stream or a single stream for >> each phone will be created? >> >> Thanks again. >> Stefano >> >> >> Inactive hide details for Steve Totaro <stevetotaro at hotmail.com>Steve >> Totaro <stevetotaro at hotmail.com> >> >> >> >> >> >> *Steve Totaro <stevetotaro at hotmail.com>* >> Inviato da: >> asterisk-users-bounces at lists.digium.com >> >> >> Phone: >> 01/03/2007 18.33 >> Per favore, rispondere a Asterisk Users >> Mailing List - Non-Commercial Discussion >> >> >> >> Per: Asterisk Users Mailing List - Non-Commercial Discussion >> <asterisk-users at lists.digium.com> >> Cc: (ccr: Stefano TOTARO/ITVRN01/Transport/ALSTOM) >>Oggetto: Re: [asterisk-users] Multiple simultaneous calls >> >> >> >>stefano.totaro at transport.alstom.com wrote: >>> >>> Hi Guys, >>> I am a novice of Asterisk and I need some experts help to understand >>> what I can get out of it. >>> I need to make multiple calls (let say 50) at once to autoanswering >>> softphones on a LAN and send all of them the same message that they >>> will repeat with loudspeakers in the same environment. >>> I am a little concerned about synchronization of the phones and >>> moreover it is not much clear to me if I have to open 50 connections >>> and send 50 times the same packets or if can use in some way the >>> multicast. >>> Is there anybody that may give me some idea. >>> Thanks in advance, >>> Stefano >>> >> I suppose you could do that although, I am unclear on the auto-answering >> softphone and the loudspeaker thing. Is this just for overhead paging >> or something? >> >> You could put all the phones in a ring group with ringall and use the >> computer's sound card to connect to an amplified speaker setup. >> >> You could also look at ices2 to stream audio or some other streaming >> technology. >> >> Thanks, >> Steve > ________________________________ Cheap Talk? Check out Yahoo! Messenger's low PC-to-Phone call rates. _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
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