CCNA Exam 642-414
Title: IP Telephony Design Exam (IPTD)
Ver: 02.12.07
Example Question out of 219 Questions:
What are the conferencing guidelines for a single-site deployment? (Choose two)
A. Use a single type of codec.
B. Use hardware conferencing only for small deployments.
C. Make certain the Meet-Me and Ad-hoc conference resources each account for a minimum of 5% of the user base.
D. Group any conferencing resources into MRGLs based on their location, to manage admission control.
Answer: A, C
For a single-site deployment it is recommended to use only G.711 codec for all endpoints.
General conferencing guidelines are to provide Ad-Hoc and Meet-Me conferencing resources for at least 5 percent of the user base. Digital signal processing (DSP) resources: For advanced activities such as conference calling and transcoding, the IP telephony system must have adequate DSP resources. With conference calls, the system must be able to simultaneously blend voice transmissions from a number of users. Likewise, most calls are transmitted across the WAN using a low bandwidth codec such as G.729a. At the opposite end of the WAN, transmissions will need to be transcoded to G.711 codec if the destination device does not “speak” G.729a. These functions require DSP resources.
Ref:
http://www.ciol.com/content/flavour/voip/102052801.asp
CCNA Exam 642-414 – IP Telephony Design Exam (IPTD)
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