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<a class="rwp-pr" href="http://rwire.com/1329747">SIP Based IP PBX Market Is Booming Worldwide : Microsoft, Vonage, Mitel, NetSapiens, Brekeke Software</a><script>!function(){var e="rwp-platform";if(!document.getElementById(e)){var t=document.createElement("script");t.id=e,t.src=("https:"===document.location.protocol?"https":"http")+"://publisher.releasewire.com/embed.js",t.async=!0,document.body.appendChild(t)}}();</script>

SIP Based IP PBX Market Is Booming Worldwide : Microsoft, Vonage, Mitel, NetSapiens, Brekeke Software