A.end-to-end network delay times that exceed 50 ms for real-time traffic are considered unacceptable
B.end-to-end network delay times that exceed 250 ms for real-time traffic are considered unacceptable
C.end-to-end network delay is not a factor as long as the delay is consistent
D.some packet loss can be corrected by codec algorithms
E.RSVP handles voice packet retransmission
F.fragmentation is a result of packet loss
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A.analog trunks that provide the Survivable Remote Site Telephony (SRST) feature
B.analog trunks that provide VoIP gateway functionality
C.analog trunks that connect a gateway to plain old telephone service (POTS) device such as analog phones, fax machines, and legacy voice-mail systems
D.analog trunks that connect a gateway to a central office (CO) or private branch exchange (PBX)
A.sampling
B.packetization
C.quantization
D.serialization
A.The router that is directly connected to the IP phone will look up the called number in its call routing table.
B.The router that is directly connected to the IP phone will inform its call agent when a service request is detected.
C.When the IP phone is picked up，the IP phone initiates the service request.
D.The directly connected router passes the collected digits to its call agent，and the call agent looks up in its call-routing table the called number.
A.propagation delay
B.voice packet serialization delay
C.congested egress queues
D.header overhead
E.packets dropped because of CRC errors
A.Calls to the PSTN can be made via the use of FXO or T1/E1 trunk ports.
B.Calls to the PSTN can be made via FXS or T1/E1 trunk ports.
C.Analog and IP phones can be connected to the VoIP network via FXO or T1/E1 trunk ports.
D.Calls between analog phones that are attached to the FXS ports in a VoIP network can be completely processed by voice-enabled routers.
最新試題
What are three factors used to determine the amount of bandwidth that is required for a single VoIP call？ （）
What are two ways to minimize the delay of VoIP packets that are traversing a network？ （）
Which two statements about the Wi-Fi Multimedia （WMM） standard are true？（）
Which three functions can an Integrated Services Router perform in a VoIP network？（）
Which two functions can be provided by an Integrated Services Router （ISR） in a VoIP network？（）
Within the WMM policy， how many default QoS radio access categories are there？（）
Which two commands should be entered on a WLAN controller to remove any residual configuration？（）
Which two characteristics are common between traffic policing and traffic shaping？（）
Which of the items stated is typically the most expensive method of improving QoS across WAN links？（）
What is the term that is used to describe the process of converting a signal from digital to analog？（）