名词解释题Off-air call setup
名词解释题
Off-air call setup
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Which statement is true about the distributed call control in a VoIP network？（）A、the VoIP endpoints have the intelligence to set up and control callsB、Call setup and control functionality is centralized in one call agent or clusterC、Call setup and control resides in call agents that are distributed throughout the networkD、Each VoIP device has separate call control， voice packetization， and transport mechanisms
CALL CONFIRMED是从MS发送到MSC的信号，其作用是（）。A、响应MSC的SETUP信号B、响应MSC的AUTHENTICATION REQUEST信号C、响应MSC的PAGING COMMAND
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In a VoIP network， which three call signaling protocols are supported by the Cisco CallManager for call setup， call maintenance， and call teardown？ （）A、 H·323B、 UDPC、 RTPD、 TCPE、 Media Gateway Control Protocol （MGCP）F、 session initiation protocol （SIP）
Which of the following are functions that are often provided by an ITSP but are not typically provided by the PSTN？（）A、 QoSB、 call setup and teardownC、 call routingD、 call supervisionE、 audio signal compression
Which statement describes the distributed call control model in VoIP networks？（）A、The gateway voice-capable device is configured to support call control directly performing call setup， call maintenance， and call teardownB、The gateway voice-capable device has a local call routing table configured through a routing protocol.C、The gateway voice-capable device relies on a call agent to support call control.D、The gateway voice-capable device relies on a gatekeeper to support call setup， call maintenance， and call teardown.
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单选题Which statement is true about the distributed call control in a VoIP network？（）Athe VoIP endpoints have the intelligence to set up and control callsBCall setup and control functionality is centralized in one call agent or clusterCCall setup and control resides in call agents that are distributed throughout the networkDEach VoIP device has separate call control， voice packetization， and transport mechanisms
单选题Which setup procedure begins on the Cisco CRS server immediately after Cisco CRS 4.5 is completely installed?（）ACisco Unified CallManager cluster setup BSQL 2K server setup CCisco CRS server setup DCisco CRS cluster setup
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单选题Which statement describes the distributed call control model in VoIP networks？（）AThe gateway voice-capable device is configured to support call control directly performing call setup， call maintenance， and call teardownBThe gateway voice-capable device has a local call routing table configured through a routing protocol.CThe gateway voice-capable device relies on a call agent to support call control.DThe gateway voice-capable device relies on a gatekeeper to support call setup， call maintenance， and call teardown.
多选题Which two statements are true about CAC？（）ACAC is implemented in the call setup phase to allocate bandwidth resourcesBCAC is implemented in the call maintenance phase to allocate bandwidth resourcesCCAC is utilized during the call teardown phase to ensure that all resources have been releasedDCAC uses the Cisco RSVP （Resource Reservation Protocol） Agent to integrate call-processing capabilities with the underlying network infrastructureECAC is implemented in the call setup phase to determine the destination of the call
多选题In a VoIP network， which three call signaling protocols are supported by the Cisco CallManager for call setup， call maintenance， and call teardown？（）AH323BUDPCRTPDTCPEMedia Gateway Control Protocol (MGCP)Fsession initiation protocol (SIP)