About: sip proxy

Premodifier: sip
Head noun: proxy

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

Broader concepts

label	provenance	confidence
device	isap:155048240	0.458940
element	isap:223050724	0.382858

Narrower concepts

label	provenance	confidence
accurate call accounting	isap:476151270	0.614781
pre-paid rating	isap:119975870	0.540097
billing	isap:32549278	0.220512