My gut feeling is that, since you have 4,000 phones, trying to do something to the lot of them all at once will not be possible. You'd have a better chance if you selected key phones in certain areas and used the speaker phone. E.g., In a cubicle farm, 1 in 25 phones could be elected. Of course this means you'd need a seating chart. <br><br>An ip overhead paging solution might be the ultimate solution, but I realize you asked about phones. <br><br> Do you want to make the phones play a tone or do you want to have a human voice speak? <br><br>The best option is probably going to avoid call signaling and instead leverage the phones API. Possibly the play command or join multicast command. <br><br>For either command, you might want to offload the authentication to a fast web server that answers blindly with a "true."<br><br>The play command puts stress on your TFTP server and its max connections. <br><br>The join multicast command requires mroute on your network. This how single wire informacast works. Have you used an ip multicast paging solution before? Do you have one? <br><div class="gmail_quote">On Thu, Nov 6, 2014 at 7:27 AM Andy <<a href="mailto:andy.carse@gmail.com">andy.carse@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I know that this is going to bring a smile to some people, but I’ll ask the question.<br>
I have a request come in<br>
“Can we use the phones to mark the start and finish time for marking the silence on 11 Nov”<br>
<br>
I thought about using a broadcast hunt group, but there are 4,000 handsets.<br>
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I have read somewhere that you can only use a handfull of devices in a broadcast hunt group, so I’m looking for some divine inspiration should anyone have any to spare.<br>
obviously if it can’t be easily achieved then I do have the option to say no.<br>
<br>
Andy<br>
<a href="mailto:andy.carse@gmail.com" target="_blank">andy.carse@gmail.com</a><br>
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