About: virtual pbx

Premodifier: virtual
Head noun: pbx

Same concepts
http://dbpedia.org/resource/Business_telephone_system

Broader concepts

label	provenance	confidence
communication	isap:278436553	0.498144
provider	isap:331077139	0.466119
service	isap:235398150	0.442788
system	isap:214841102	0.401311
alternative	isap:111770130	0.353766
solution	isap:330400270	0.346368

Narrower concepts

label	provenance	confidence