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
