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) total
• C. 5 kilobits per second (kbps) total
• D. 20 kilobits per second (kbps) per stream

Northwind Traders has a Lync 2013 deployment. The company has outsourced the help desk to a third-party service provider that is located in New Delhi. The service provider has a 10-MB site-to-site virtual private network (VPN) connection to Northwind Traders. The service provider uses a proxy server to route and monitor traffic to Northwind Traders. Both sites' computers are on the 10.10.1.x/24 subnet. The proxy server's Northwind Traders-facing IP is 192.168.1.100.
New Delhi users can access Northwind Traders' Lync environment with [email protected], and they are able to access conferences without issue. However, users complain that they are unable to share their desktops.
You need to recommend a solution.
Which two actions should you recommend? (Each correct answer presents a complete solution. Choose two.)

• A. Add an Edge server at the New Delhi office.
• B. Route Lync traffic externally by using the Edge server.
• C. Disable all firewalls between Northwind Traders and New Delhi.
• D. Change IP scope and remove the proxy server.

HOTSPOT
You analyze the results of Lync traffic modeling by using the Lync Bandwidth Calculator. The relevant portion of the network topology is shown in the exhibit. (Click the Exhibit button.)

You need to calculate the volume of audio and video conferencing traffic through the Toronto office Multiprotocol Label Switching (MPLS) link.
Which cell or cells in the Lync Bandwidth Calculator should you select to perform this calculation? (To answer, select the appropriate cell or cells in the Lync Bandwidth Calculator.)

Your client network includes a main office located in Toronto and five branch offices connected to the main office by a Multiprotocol Label Switching (MPLS) network. The main office is connected to the Internet through a 100 Mbps link.
You complete Lync traffic modeling based on the values provided by the client- The relevant portions of Lync Bandwidth Calculator tool information include:
Site definitions and its WAN link info as shown in the exhibit (Click the Exhibit button.)
Central Sites RTC Bandwidth Required Vs. Available as shown in the exhibit (Click the Exhibit button.)
Branch Sites RTC Bandwidth Required Vs. Available as shown in the exhibit (Click the Exhibit button.)



You prepare a final report with the results of the Lync network readiness assessment.
You need to include a recommendation in the report.
What should you recommend to the client?

• A. Allocate 4 Mbps bandwidth of WAN link to RTC traffic in the Regina office.
• B. Allocate 30 Mbps bandwidth of WAN link to RTC traffic in the Toronto office.
• C. Upgrade the WAN link in the Montreal office at least to 20 Mbps.
• D. Upgrade the WAN link in the Regina office to at least 15 Mbps.

Your company corporate telephony environment is a combination of Lync 2013 and traditional Private Branch Exchange (PBX). The company has three sites that are connected by a Multiprotocol Label Switching (MPLS) topology. There are 1,250 users who are using Lync 2013 and 2,250 users who are using the PBX environment. On average, the company has 3 percent of its users dialing in for conferences and 6 percent on a public switched telephone network (PSTN) call at any time.
The company plans to remove the PBXs and have all users use only Lync 2013.
You need to generate a usage model based on the existing data usage and real-time communications through all of the PBXs.
Which two pieces of information should you collect when you performing usage modeling? (Each correct answer presents part of the solution. Choose two.)

• A. number of intersite calls through PSTN
• B. number of calls that use RTAudio Wideband
• C. number of peer-to-peer (P2P) calls over the MPLS network
• D. number of calls that use G.722
• E. number of PSTN channels provisioned