About: three-way calling

Premodifier: three-way
Head noun: calling

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

Broader concepts

label	provenance	confidence
enhance feature	isap:433818539	0.797338
service	isap:438806768	0.771623
custom call feature	isap:265834152	0.748834
feature	isap:433818512	0.715910
value-added service	isap:438806778	0.672114
useful feature	isap:433818526	0.662487

Narrower concepts

label	provenance	confidence