Assertion: ip telephone system | /r/CapableOf | use packet-switched voice
Facets:
value: over internet telephony
type: TRANSITIVE-OBJECT
value: over ip
type: OTHER
value: to transmit telephone calls
type: PURPOSE
Source sentences:
text: An IP telephone system uses packet-switched Voice over IP (VoIP), or Internet telephony, to transmit telephone calls over the Internet as opposed to the circuit-switched telephony used by the traditional Public Switched Telephone Network (PSTN).