多项选择题
Which two statements are correct about the signaling methods that are utilized for transmitting voice？ （）
A. Channel-associated signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.
B. Channel-associated signaling utilizes a separate TDM channel for transmitting control signals.
C. Common channel signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.
D. Common channel signaling uses one of the TDM channels to transmit control information reducing the number of channels available for voice.
E. ISDN BRIs implement channel-associated signaling.
相关考题
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多项选择题
WhichtwoVoIPcapabilitiesareutilizedwhentheCallManagerandthegatewayareconfiguredforSurvivableRemoteSiteTelephony？（）
A. Analog phones， connected to the PSTN， act as internal call agents if IP communication to the CallManager is lost.
B. An onsite gateway reroutes calls over the PSTN if IP communication to the CallManager is lost.
C. The IP phones can reroute calls over the PSTN if IP communication to the CallManager is lost.
D. Local voice gateways can assume the function of a call agent if IP communication to the CallManager is lost.
E. IP phones use an internal call agent if IP communication to the CallManager is lost. -
单项选择题
Whatcanbeusedtomaintainthevoicequalityonalinkbylimitingthenumberofcallsthatcanbeactiveatanygiventime？（）
A. Call Management Link Agent
B. Traffic policing
C. Call Admission Control
D. QoS Link Congestion Management
E. Oversubscription Link Detection -
单项选择题
WhichstatementistrueabouttheCallAdmissionControl（CAC）featureinVoIPnetworks？（）
A. CAC is used to allocate enough bandwidth for the number of calls that are allowed on the VoIP network.
B. CAC is used to protect the quality of the voice calls by preventing call establishment if enough resources are not available on the network.
C. CAC provides queuing mechanisms for voice calls if the packets exceed the configured or budgeted rate.
D. In a VoIP network the CAC can be replaced with the LLQ QoS mechanism if it has been properly implemented.
