Microsoft 74-924 Real Exam Questions

Microsoft Office Communications Server 2007 R2 – U.C. Voice Specialization

This exam is designed for IT, Telecommunications, and Networking professionals who have experience using Office Communications Server 2007 or Office Communications Server 2007 Release 2. Candidates should also have experience using and configuring Windows Server Active Directory and network infrastructure components that support the deployment and ongoing management of Office Communications Server 2007 versions.

1: You have deployed Microsoft Office Communications Server (OCS) 2007 Enterprise Edition pool with full functionality. You plan to provide secure remote access to OCS 2007 Enterprise Voice features. You need to determine how the A/V Edge Server provides a secure media path for remote users by using Interactive Connectivity Establishment (ICE) to place calls. Which steps are involved in establishing a secure media path by using ICE? Choose four answers that apply.
A.The SIP SERVICE request is sent to the Media Relay Authentication Service (MRAS), which provides credentials for later use in the call setup.
B.The SIP INVITE message will contain candidate pairs that indicate the addresses discovered.
C.The Media Relay Authentication Service (MRAS) is used to obtain credentials on behalf of the user when they have a valid candidate pair.
D.The 200 OK SIP response that is sent during address exchange will contain candidate pairs.
E.The SIP INVITE message and 200 OK SIP response that are sent during candidate promotion will have only one candidate pair.
F.The SIP 200 OK message that is sent during initial session setup contains the <mediarelay> XML tag containing supported internal and external ports.
G.The SIP 200 OK packet that is sent during the provisioning phase contains the <mrasuri> XML tag that includes a pointer to the Web Conferencing Server FQDN.
Correct Answers: A B D E

2: You are designing a new installation of Microsoft Office Communications Server (OCS) 2007. The OCS 2007 installation includes the Mediation Server, the media gateway, and connectivity to the public switched telephone network (PSTN). You need to configure OCS 2007, the Mediation Server, and the media (SIP/PSTN) gateway to allow external calls to the PSTN. What should you do?
A.Configure OCS 2007 to send RTAudio to the Mediation Server.Configure the Mediation Server to send G.711 to the media gateway.Configure the media gateway to use G.711 for calls sent to the PSTN.
B.Configure OCS 2007 to send G.711 to the Mediation Server.Configure the Mediation Server to send G.711 to the media gateway.Configure the media gateway to use G.711 for calls sent to the PSTN.
C.Configure OCS 2007 to send RTAudio to the Mediation Server.Configure the Mediation Server to send RTAudio to the media gateway.Configure the media gateway to convert RTAudio to G.711 for calls sent to the PSTN.
D.Configure OCS 2007 to send G.711 to the Mediation Server.Configure the Mediation Server to send RTAudio to the media gateway.Configure the media gateway to convert RTAudio to G.711 for calls sent to the PSTN.
Correct Answers: A

3: Your company is planning to deploy a Microsoft Office Communications Server (OCS) 2007 server.  Currently, the company has an office in a single data center that supports 15,000 users. Five thousand users work remotely and use A/V conferencing. The company will add remote offices in the future. You plan to deploy an Edge Server topology in the network of the company to support the existing media traffic on the network. You need to ensure that in the future the Edge Server topology can accommodate 5,000 new users in a remote location with minimal changes to the existing design. Which topology should you deploy?
A.Multi-Site Edge
B.Single-Site Edge
C.Consolidated Edge
D.Scaled Single-Site Edge
Correct Answers: D

4: You have recently deployed Microsoft Office Communications Server (OCS) 2007 to your company network. Your company has 5,000 users at its main office. You are currently enabling Enterprise Voice for all users at the main office. 
The network environment has a legacy private branch exchange (PBX). You want to integrate OCS 2007 with the PBX by using a qualified and supported third-party media (SIP/PSTN) gateway as specified in the Open Interoperability Program (OIP). 
Voice usage during peak hours at the main office is as follows:
  10 percent of the users are heavy users.
  30 percent of the users are medium users.
  60 percent of the users are light users. 
You need to determine the appropriate sizing requirements for the media (SIP/PSTN) gateways to accommodate 5,000 Enterprise Voice users.
How many ports and T1 lines do you require?
A.250 ports and 16 T1 lines
B.350 ports and 11 T1 lines
C.450 ports and 20 T1 lines
D.550 ports and 32 T1 lines
Correct Answers: C

5: You are planning to deploy a Microsoft Office Communications Server (OCS) 2007 network. The deployment plan includes installation of 500 Microsoft Office Communicator phones in Boston.
You need to ensure that the OCS 2007 deployment meets the following requirements:
Users must be able to make Office Communicator calls to each other by using the Session Initiation Protocol (SIP) addresses and a five-digit dialing feature.
Users must be able to make Public switched telephone network (PSTN) calls to the Office Communicator phones.
Which three actions should you perform? (Each correct answer presents part of the solution. Choose three.)
A.Install and configure a Mediation Server in Boston.
B.Configure all the Office Communicator users with a SIP URI and a full E.164 number.
C.Configure a Phone Usage record for Boston, and assign it to the Office Communicator users.
D.Configure a Route to the Boston Mediation Server, and configure the Target Regular Expression to support the five-digit dialing feature.
E.Configure a normalization rule in the Boston location profile to translate the five-digit dialing into a full E.164 number for the Office Communicator users.
Correct Answers: A B E

6: You deploy a Microsoft Office Communications Server (OCS) 2007 Standard Edition server to your company network. You install a consolidated Edge Server. You need to identify the best practices for deploying the Edge servers. Which best practices should you recommend? Choose two correct answers that apply. (Each correct answer presents a complete solution.)
A.Deploy Edge Servers in Windows workgroup.
B.Deploy Edge Servers in the internal corporate domain and restrict access to selected users.
C.Provide physical separation of internal and external networks.
D.Install the Edge Server on a virtual machine to restrict physical access.
E.Create a single certificate for the Access Edge server role and include the Web Conferencing server fully qualified domain name (FQDN) in the SAN entry.
Correct Answers: A C

7: You have deployed Microsoft Office Communications Server (OCS) 2007 in your company. The company has its main office in Chicago and branch offices in Dallas, Detroit, Madrid, and Singapore. The branch offices are connected to the main office by using an IP WAN. The company has installed a private branch exchange (PBX) at the main office. Local calls made by branch office users traverse the WAN to the PBX at the main office, and then back out through the Public Switched Telephone Network (PSTN) as long distance calls. This results in excessive operating costs. You need to provide a solution that will reduce operating costs. Which three actions should you perform for each branch office? Choose two correct answers that apply. (Each correct answer presents part of the solution.)
A.Deploy a pool at each branch location.
B.Install a Mediation Server at the main office and configure Least-Cost Routing.
C.Install a media (SIP/PSTN) gateway and a Mediation Server at the respective branch location.
D.Configure location profiles for the branch locations and assign routing through the specific branch location.
E.Configure the PBX to route calls to the correct branch location and enable PBX integration for remote users.
F.Create a single location profile that all users can use and install a media (SIP/PSTN) gateway and a 1:1 corresponding Mediation Server for each branch location.
Correct Answers: C D

8: You have deployed Microsoft Exchange Server 2007 Service Pack 1 along with Microsoft Office Communications Server (OCS) 2007. You integrate Exchange server 2007 SP1 and OCS 2007 to provide a single Unified Communications environment for all users. When users are enabled for Enterprise Voice, they are no longer able to receive faxes to their Inbox. You need to ensure that users can receive faxes to their Inbox. Which four steps should you perform? Choose four correct answers that apply. (Each correct answer presents part of the solution.)
A.Enable fax detection on the OCS Mediation Server by configuring the EnableInbandFaxDetection setting in the globcfg.xml file.
B.Add the fax protocol codec (T.38) to the OCS Mediation Server.
C.Enable the UM Dial Plan to accept faxes and configure the EnableInbandFaxDetection setting in the globcfg.xml file.
D.Deploy a second IP gateway and assign a telephone number range.
E.Assign an additional telephone number for each user for receipt of faxes only.
F.Create a new Dial Plan on the UM server.
Correct Answers: C D E F

9: Your company has offices in New York and London connected by an IP WAN configured for full duplex. You deploy a Microsoft Office Communications Server (OCS) 2007 Standard Edition front-end server in the New York office.  Microsoft Office Communicator 2007 users place voice calls between the two offices through the WAN. You discover that most of the IP WAN bandwidth is utilized by data traffic. Only 440 Kbps of bandwidth is available for voice calls. You need to calculate the number of concurrent voice calls that will be supported between the two offices, including Ethernet and SRTP overhead per call. How many calls should the current configuration support?
A.A total of eight calls will be supported by using Siren.
B.A total of six calls will be supported in either direction by using G.711.
C.A total of seven calls will be supported in either direction by using Wideband codec.
D.A maximum of three calls will be supported in any one direction at any one time by using Wideband codec.
Correct Answers: C

10: You deploy a Microsoft Communications Server (OCS) 2007 Standard Edition pool to an existing Microsoft Exchange Server 2007 Service Pack 1 environment of your company. Several users within the company are using Exchange Server 2007 Unified Messaging (UM) by using a media (SIP/PSTN) gateway connected to the time-division multiplexed (TDM) public branch exchange (PBX). You want to enable OCS 2007 users for Enterprise Voice and UM with minimal interruption of service. You need to integrate OCS 2007 with the existing UM deployment. What should you do? Choose the correct answer that applies.
A.Create a new OCS 2007 UM dial plan, disable the UM mailbox, enable a new UM mailbox, and reset the users PIN.
B.Rename the existing UM dial plan to match the fully qualified domain name (FQDN) of the OCS location profile and reset the users PIN.
C.Connect the OCS 2007 Front End Server to the same media (SIP/PSTN) gateway used by Exchange UM. Create a new UM dial plan, move the user to the new dial plan, and assign a new PIN.
D.Move the user from the UM dial plan to the OCS 2007 UM dial plan by using the Exchange Management Console. Ensure that the PIN length and complexity requirements match between dial plans.
Correct Answers: A

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