问题:
A . RSVP is a required configuration to support conference calls without voice packet loss.
B . The QoS configuration on the 831 router must always provision sufficient bandwidth for two RTP streams.
C . Call admission control is an issue only when using hardware DSP resources.
D . When using the conference call features on a 7960 IP phone, only one RTP stream is present regardless of how many extensions are on the conference.
● 参考解析
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