http://phone.manualsonline.com/manuals/mfg/cortelco/8780.html User submitted content regarding Cortelco Telephone 8780 http://www.owneriq.net/images/sites/www.owneriq.net/logo_notag.gif http://www.owneriq.net 144 57 en-us Mon, 17 Nov 2008 11:37:50 -0500 240 http://phone.manualsonline.com/ex/thread/view/idThread/1095807?s=rss <em style="font-style: italic;">I have a Cortelco 8780 phone, and I can't figure out how to put it on mute when on speaker phone. Any ideas?</em><br /><br /> <strong style="font-weight: bold;">Latest post, made on 2008-11-17 11:37:50</strong><br /> I have a Cortelco 8780 phone, and I can't figure out how to put it on mute when on speaker phone. Any ideas? 1095807#1222922 Mon, 17 Nov 2008 11:37:50 -0500