1.1 --- a/data/dictionary.xml	Mon Aug 19 16:40:02 2013 +0200
     1.2 +++ b/data/dictionary.xml	Mon Aug 19 16:53:20 2013 +0200
     1.3 @@ -2586,6 +2586,29 @@
     1.4  		</explanation>
     1.5  	</concept>
     1.6  	<concept>
     1.7 +		<term abbreviation="PBX" completeForm="private branch exchange" language="en"/>
     1.8 +		<explanation language="en">
     1.9 +			<text>
    1.10 +				a kind of telephone exchange used in some office or company for its own purposes;
    1.11 +				provides FSX interface for connected phones;
    1.12 +				can have FXO interface for connecting to PTSN (for calling outside the company);
    1.13 +				nowadays are often deployed digital VoIP PBXes based on free software like Asterisk;
    1.14 +				such telephony can be pure IP based with no POTS or can have some FSX or FXO interfaces
    1.15 +			</text>
    1.16 +		</explanation>
    1.17 +	</concept>
    1.18 +	<concept>
    1.19 +		<term abbreviation="PSTN" completeForm="public switched telephone network" language="en"/>
    1.20 +		<explanation language="en">
    1.21 +			<text>
    1.22 +				the worldwide public telephony network consisting of networks of particular carriers;
    1.23 +				the network is developed according to ITU-T standards and recommendations
    1.24 +				and uses uniform system of telephone numbers based on ITU-T recommendation E.164
    1.25 +				which provides a single global address space for telephone numbers
    1.26 +			</text>
    1.27 +		</explanation>
    1.28 +	</concept>
    1.29 +	<concept>
    1.30  		<term abbreviation="POTS" completeForm="plain old telephone service" language="en"/>
    1.31  		<explanation language="en">
    1.32  			<text>