diff -r 2112e98cd657 -r ff35e7948cbe data/dictionary.xml
--- a/data/dictionary.xml	Sat Aug 17 00:03:30 2013 +0200
+++ b/data/dictionary.xml	Sat Aug 17 00:21:39 2013 +0200
@@ -1130,7 +1130,16 @@
 	</concept>
 	<concept>
 		<term abbreviation="VoIP" completeForm="voice over IP" language="en"/>
-		<explanation language="en"><text></text></explanation>
+		<explanation language="en">
+			<text>
+				delivering voice communication (or other multimedia sessions like video) over the Internet Protocol (IP) instead of traditional telco networks;
+				there are open and standard protocols for signaling: SIP and XMPP and open protocols for the payload (audio/video) like RTP;
+				VoIP is nowadays widely used inside companies where often shares same ethernet network with computers (can be separeted by VLANs)
+				and also in households espetially for cheap overseas calls;
+				as VoIP phone can be used a computer with appropriate software or a cell phone or dedicated hardware phone;
+				there are also gateways that enable connecting old analog phones to the VoIP network
+			</text>
+		</explanation>
 	</concept>
 	<concept>
 		<term abbreviation="SIP" completeForm="session initiation protocol" language="en"/>