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<p>How about Intercom? From what I remember (and read below) it's a feature which automatically connects the caller to the recipient in whisper mode so that the called party hears everything but can't actually talk back until they initiate so. No ringing, auto-answer.
 I'm not sure if there is a one-to-one or one-to-many relationship and how that would work at the end unit. But that being said, that would be a problem with any solution. Multiple locations sending panic calls to one destination (campus police).</p>
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<p>If it were me, I'd investigate intercoms.</p>
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<p><a href="http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmfeat/CUCM_BK_F3AC1C0F_00_cucm-features-services-guide-100/CUCM_BK_F3AC1C0F_00_cucm-features-services-guide-100_chapter_0100011.html" class="OWAAutoLink" id="LPlnk979761" previewremoved="true">http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmfeat/CUCM_BK_F3AC1C0F_00_cucm-features-services-guide-100/CUCM_BK_F3AC1C0F_00_cucm-features-services-guide-100_chapter_0100011.html</a></p>
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 and Services Guide for Cisco Unified ...</a></div>
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www.cisco.com</div>
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Features and Services Guide for Cisco Unified Communications Manager, Release 10.0(1) -Intercom</div>
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<div>---</div>
<div>Lelio Fulgenzi, B.A.</div>
<div>Senior Analyst, Network Infrastructure</div>
<div>Computing and Communications Services (CCS)</div>
<div>University of Guelph</div>
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<div>519-824-4120 Ext 56354</div>
<div>lelio@uoguelph.ca</div>
<div>www.uoguelph.ca/ccs</div>
<div>Room 037, Animal Science and Nutrition Building</div>
<div>Guelph, Ontario, N1G 2W1</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> cisco-voip <cisco-voip-bounces@puck.nether.net> on behalf of Lisa Notarianni <lisa.notarianni@scranton.edu><br>
<b>Sent:</b> Monday, January 30, 2017 4:18 PM<br>
<b>To:</b> cisco-voip@puck.nether.net<br>
<b>Subject:</b> [cisco-voip] Panic Button Solution?</font>
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<p><span style="font-size:10.0pt; font-family:"Verdana",sans-serif; color:black">Call Manager
</span><span style="color:black">10.5.2.12901-1</span><span style="font-size:10.0pt; font-family:"Verdana",sans-serif; color:black"></span></p>
<p><span style="font-size:10.0pt; font-family:"Verdana",sans-serif; color:black"> </span></p>
<p><span style="font-size:10.0pt; font-family:"Verdana",sans-serif; color:black">I have a request from a department here at The University of Scranton to use a button on their phone as a panic button that would do the following:</span></p>
<p style="margin-left:.5in; text-indent:-.25in"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black"><span style="">1.<span style="font:7.0pt "Times New Roman"">      
</span></span></span><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">Automatically dial our Police department without a ring tone</span></p>
<p style="margin-left:.5in; text-indent:-.25in"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black"><span style="">2.<span style="font:7.0pt "Times New Roman"">      
</span></span></span><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">Provide one way communication to University Police so they can listen to the conversation to get an idea of the issue and then dispatch an officer</span></p>
<p style="margin-left:.5in"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">It is important to have silence on the phone connection when the button is pressed</span></p>
<p><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">I looked into PLAR but I don’t think it can be configured exactly this way.  We have a SingleWire server but it is in the process of being upgraded. So, before we install a physical
 panic button without a voice feature, we wondered if there were any other creative solutions.</span></p>
<p><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">Thank you in advance -
</span></p>
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<span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">Lisa Notarianni</span></p>
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<span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D"><img naturalheight="164" naturalwidth="468" width="448" height="157" id="Picture_x0020_1" alt="Lisa Notarianni Telecom Engineer" aria-expanded="false" tabindex="0" style="user-select: none;" src="cid:image001.png@01D27B14.6204F4A0"></span></p>
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