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Question 10: Your company corporate telephony environment is a combination of Lync 2013 and traditional
Private Branch Exchange (PBX). The sites are connected by a Multiprotocol Label Switching (MPLS)
topology. There are 750 users who are using Lync 2013 and 2,500 users who are using the PBX
environment. On average, the company has 10 percent of its users in conferences. The company
plans to add additional bandwidth for all sites.
The company is concerned about the number of dropped calls on the PBXs.
As part of a bandwidth upgrade process, you model real-time transport protocol (RTP) media call
flows for audio communications. You have determined the average number of calls and estimated
the bandwidth required for the audio portion of the calls.
You need to identify the additional bandwidth requirements when modeling real-time transport
control protocol (RTCP) traffic.
Which bandwidth option should you choose?
A. 5 kilobits per second (kbps) per stream
B. 20 kilobits per second (kbps) per stream
C. 5 kilobits per second (kbps) total
D. 20 kilobits per second (kbps) total
Correct Answer: A
Explanation:
RTCP Bandwidth Media RTCP maximum bandwidth (Kbps)
Audio 5
Video 10
An Introduction to Network Assessment Concepts: Microsoft Unified Communications