Recertification for MCSE: Communication
Question No: 121 DRAG DROP – (Topic 8)
You need to recommend a solution to meet the UM requirements. What should you configure to meet each requirement?
To answer, drag the appropriate configurations to the correct requirements in the answer area.
Each configuration may be used once, more than once, or not at all. Additionally, you may
need to drag the split bar between panes or scroll to view content.
Box 1: A UM Dial plan Box 2: A UM Dial plan
Box 3: A UM auto attendant Box 4: A UM mailbox policy
A Unified Messaging (UM) dial plan is created using an organization-wide scope and contains configuration information related to your telephony network. A UM dial plan establishes a link from the telephone extension number of a Microsoft Exchange Server 2010 recipient in Active Directory to a UM-enabled mailbox.
You can create a Unified Messaging (UM) mailbox policy to apply a common set of UM policy settings, such as PIN policy settings or dialing restrictions, to a collection of UM-
enabled mailboxes. UM mailbox policies link a UM-enabled user with a UM dial plan and apply a common set of policies or security settings to a collection of UM-enabled mailboxes. UM mailbox policies are useful for applying and standardizing UM configuration settings for UM-enabled users.
Incorrect: After you create a Unified Messaging (UM) auto attendant, incoming calls to an external telephone number that a human operator would ordinarily answer are answered by the auto attendant.
Question No: 122 DRAG DROP – (Topic 8)
You need to identify which configurations must be implemented for the planned Lync Server 2013 deployment. The solution must meet the network requirements.
Which features should you use?
To answer, drag the appropriate features to the correct requirements in the answer area. Each feature may be used once, more than once, or not at all. Additionally, you may need to drag the split bar between panes or scroll to view content.
Differentiated services Note:
Real-time communications are sensitive to the latency and packet loss that can occur on congested networks. Call admission control (CAC) determines, based on available network bandwidth, whether to allow real-time communications sessions such as voice or video calls to be established.
Media bypass is a Lync Server capability that enables an administrator to configure call routing to flow directly between the user endpoint and the public switched telephone network (PSTN) gateway without traversing the Mediation Server. Media bypass improves call quality by reducing latency, unnecessary translation, possibility of packet loss, and the number of potential points of failure. Where a remote site without a Mediation Server is connected to a central site by one or more WAN links with constrained bandwidth, media bypass lowers the bandwidth requirement by enabling media from a client at a remote site to flow directly to its local gateway without first having to flow across the WAN link to a Mediation Server at the central site and back. This reduction in media processing also complements the Mediation Server’s ability to control multiple gateways.
Differentiated Services code points (DSCPs) mark IP packets with the type of traffic that is contained in each packet. This information is used by QoS to determine the priority of the packet relative to other network traffic. If QoS is enabled on your network, you can take advantage of it by enabling DSCP marking on servers running Microsoft Lync Server and on Lync clients. Because Lync Server and Lync clients require that different media use different port ranges, the Windows or Windows Server operating system can identify the traffic type and apply the appropriate DSCP to each packet according to the port that it uses.
Question No: 123 – (Topic 8)
You need to recommend a solution to integrate the planned on-premises Lync Server 2013 infrastructure and Lync Online.
Which two components should you include in the recommendation? (Each correct answer presents part of the solution. Choose two.)
A Lync Server 2013 partner application
A new certificate issue by a trusted third-party certification authority (CA)
The Microsoft Online Services Directory Synchronization tool
A Session Border Controller
A Lync Server 2013 Edge pool
Question No: 124 – (Topic 8)
You are planning the deployment of two Mediation Servers in the New York office.
You need to identify the minimum number of network ports that must be configured on each Mediation Server. The solution must meet the Enterprise Voice requirements.
How many ports should you identify?
To answer, configure the appropriate number of network ports for the component in the answer area.
Answer: B Explanation:
Note: The Mediation Server translates signaling and, in some configurations, media between your internal Lync Server 2013, Enterprise Voice infrastructure and a public switched telephone network (PSTN) gateway or a Session Initiation Protocol (SIP) trunk. On the Lync Server 2013 side, Mediation Server listens on a single mutual TLS (MTLS) transport address. On the gateway side, Mediation Server listens on all associated listening ports associated with trunks defined in the Topology document. All qualified gateways must support TLS, but can enable TCP as well. TCP is supported for gateways that do not support TLS.
The main functions of the Mediation Server are as follows:
->Encrypting and decrypting SRTP on the Lync Server side
->Translating SIP over TCP (for gateways that do not support TLS) to SIP over mutual TLS
->Translating media streams between Lync Server and the gateway peer of the Mediation Server
->Connecting clients that are outside the network to internal ICE components, which enable media traversal of NAT and firewalls
->Acting as an intermediary for call flows that a gateway does not support, such as calls from remote workers on an Enterprise Voice client
->In deployments that include SIP trunking, working with the SIP trunking service provider to provide PSTN support, which eliminates the need for a PSTN gateway
The following figure shows the signaling and media protocols that are used by the Mediation Server when communicating with a basic PSTN gateway and the Enterprise Voice infrastructure.
Question No: 125 – (Topic 8)
You need to recommend changes to the Exchange Server organization to ensure that callers can leave voice mails if a server fails.
Which component should you recommend?
Two Edge servers that have Exchange Server 2010 deployed
An additional UM IP gateway
An additional Client Access server that has Exchange Server 2010 deployed
An additional Unified Messaging server that has Exchange Server 2010 deployed
Question No: 126 – (Topic 8)
You are evaluating whether the PSTN gateways must be upgraded to support the planned migration to Lync Server 2013.
You need to identify the minimum number of ports required for each PSTN gateway in the New York office. How many ports should you identify?
20 C. 100 D. 200
Answer: D Explanation:
There are 4000 users in New York. 25% of those on the phone at any one time. 20% of those calls to the PSTN. Total = 200. There are two PSTN gateways so you could answer 100 each. However for redundancy, one PSTN gateway should be able to handle all calls so 200 is the answer.
Enterprise Voice Requirements
Voice call routing in the New York office must be redundant. All outbound or inbound PSTN call routes must not depend on a single component.
Question No: 127 – (Topic 8)
You implement synchronization between Active Directory and Microsoft Office 365.
You need to recommend which tool is required to manage the phone numbers of the Exchange Online pilot users.
What should you recommend?
The Microsoft Online Services Module for Windows PowerShell
The Office 365 Exchange Online Portal
Active Directory Users and Computers
The Office 365 Lync Online Portal
Answer: C Explanation:
Question No: 128 HOTSPOT – (Topic 8)
You are designing the Lync Server 2013 infrastructure.
You need to identify the minimum number of Lync Server 2013 Mediation Servers, Lync Server 2013 trunks, and PSTN gateways that must be added to the New York office. The solution must meet the Enterprise Voice requirements.
What should you identify?
To answer, configure the appropriate number for each component in the answer area.
http://lync70337.freeforums.org/wingtip-lync-server-2013-infrastructure-t40.html 2 Mediation server matches Enterprise Voice Requirement.
MUST not depend on a single component. 2 lync trunks are to Chicago and Boston
NY already has 2 gateways. No more need to be added.
Question No: 129 – (Topic 8)
You need to configure the second phone number for the executives. The solution must meet the business requirements.
What should you use?
The Lync Server Control Panel
The Set-CsUser cmdlet
The Set-CsAdUser cmdlet
The Topology Builder
Topic 9, Contoso, Ltd Case A Overview
Contoso, Ltd. is a manufacturing company that has 4,000 employees. The company has a sales department, a marketing department, a research department, and a human resources department.
The company has four offices. The offices are configured as shown in the following table.
The New York office contains the main data center. Communications for all of the offices is routed through the New York office.
All telephone calls from the Los Angeles office and the Miami office are routed through a PSTN gateway in the New York office.
All offices connect to each other by using a WAN link. Each office connects directly to the Internet.
Active Directory Environment
The company has an Active Directory forest named contoso.com. The forest contains a single domain. All domain controllers run Windows Server 2008 R2.
Each office contains two domain controllers. Each office is configured as an Active Directory site.
Each office contains DHCP servers that run on 32-bit servers.
Lync Server Environment
The company has nine servers. The servers are configured as shown in the following table.
The company uses a SIP domain of contoso.com. The voice infrastructure is configured as shown in the following table.
All users are enabled for Enterprise Voice.
The company also contains two Edge Servers that have Lync Server 2013 deployed. The servers are configured as shown in the following table.
The Miami office has a dial plan. The dial plan is configured as shown in the following table.
The Lync Server configuration has five routes. The routes are configured as shown in the following table.
The PSTN usage for the users in the Los Angeles office is configured as shown in the following table.
The company identifies the following issues with the current infrastructure:
->Los Angeles users report that the audio quality during calls to the New York office is poor and that the calls often disconnect.
->Users in the Miami office report that when their WAN link fails, they cannot establish calls to the PSTN.
->The Miami users report that they cannot call the Los Angeles users by using a five- digit internal phone number.
Requirements Planned Changes
The company plans to implement the following changes:
->Provide voice resiliency in all of the offices if a WAN link fails.
->Implement Call Park.
->Implement an unassigned number range that has a voice announcement.
->Add an additional auto attendant.
->Implement a gateway in the Los Angeles office that uses the local PSTN.
->Migrate several users to Microsoft Lync Online. The users will use instant messaging (IM) with MSN users only. Client computers will use automatic configuration and open federation. The migrated users will use a SIP domain of cloud.contoso.com.
->Provide a backup route for each office if a gateway fails.
->Provide each office with access to the local PSTN.
The company identifies the following technical requirements:
->Enable five-digit internal dialing that uses the site code and the last four digits of the phone number range.
->Configure the New York gateway as the backup route for the local gateway in each office.
Changes to the infrastructure must minimize the number of new servers deployed.
Question No: 130 – (Topic 9)
The Los Angeles users have the following call statistics:
->Peak call concurrency is 25 percent
->Fifty percent of all placed calls are routed to the PSTN.
->Thirty percent of all placed calls are internal calls to users in the other offices.
->Twenty percent of all placed calls are conference calls.
->The average bandwidth for peer-to-peer calls is 65 kilobits per second (Kbps).
->The average bandwidth used for conference calls is 100 Kbps.
You need to identify the minimum amount of bandwidth required on the WAN link for the planned implementation of the media gateway in the Los Angeles office.
All calls to the PSTN will be routed through the local media gateway in the Los Angeles office.
10.00 megabits per second (Mbps)
7.20 megabits per second (Mbps)
3.95 megabits per second (Mbps)
2.25 megabits per second (Mbps)
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