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Deploying Enterprise Voice with Skype for Business 2015 (beta)

Question No: 21 – (Topic 4)

You need to plan a solution to allow masking of a calling number.

How can a calling number of a Skype for Business user be changed to match the main number of the company?

  1. Create a new normalization rule and add it to the global dial plan.

  2. Use the Skype for Business control panel to mask the calling number.

  3. Create a trunk translation rule that masks the called number.

  4. Use the voice gateway to mask the called number.

Answer: B

Question No: 22 – (Topic 4)

You need to configure the trunks defined in the Skype for Business topology based on the requirements.

Which two actions should you perform? Each correct answer presents part of the solution.

  1. Enable media bypass.

  2. Enable centralized media processing.

  3. Set Encryption Support Level to required.

  4. Disable REFER support.

Answer: A,D

Topic 5, Tailspin toys

Tailspin toys is a toy manufacturer. The company headquarters is located in Melbourne. The company has a design and development office located in Singapore. The company also has branch offices in Hong Kong, Jakarta, Tokyo, Sydney, and Auckland. Tailspin Toys has implemented Skype for Business Server 2015 and is actively using instant messaging (IM), presence, peer-to peer audio and video, conferencing, remote access, and federation. The company uses Exchange Online.

The number of users in each office is shown in the following table:

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Existing Environment Networks

You have the following networks:

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The network latency between each branch site and the central site is more than 25ms. Based on the network latency, you use the RTAudio codec for all public switched telephone network (PSTN) calls from the branch sites.

All Windows desktop client computers run Windows 7, Windows 8.1, or Windows 10 and are domain joined.

Skype for Business

Singapore and Melbourne each have the following Skype for Business Server 2015 components:

A front-end pool with three front-end servers

A back-end pool that is configured as a two server SQL AlwaysOn availability group A single Edge Server

A single Reverse Proxy server A single Office Web App server

Tailspin Toys currently uses a third-party dial-in conferencing provider. Moving dial-in conferencing from the third-party dial-in conferencing provider to the new Skype for Business solution will add a maximum concurrency of 50 PSTN calls to the Melbourne and Singapore sites, respectively.

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PBX and Dial plans

The following table shows the call load for the existing IP PBX solution:

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The following table details the Dial Plan for the Sydney office:

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User issues

Users report the following issues:

Users in Hong Kong report issues with media quality when using Skype for Business conferencing features.

Users who need to use Call Via Work report that this option is not visible in their desktop client.

Users in the Auckland office report issues regarding call quality. You identify that the issue relates to use of non-qualified devices. You purchase new qualified devices and have delivered the device to the Auckland office.

After the migration from the existing IP-PBX, users in Sydney report that they cannot make calls to mobile numbers.

User1 is located in the Auckland office. User1 reports persistent call quality issues. You generate the following diagnostic report for User1:

Caller Device and Signal Metrics:

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Audio Stream (Caller-gt;Callee)

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Audio Stream (Callee -gt; Caller)

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Requirements

Business Requirements

You have the following business requirements:

You must centralize voice services and reduce the costs associated with long distance and international calls.

You must implement a single voice solution across the enterprise.

Any planned changes to the solution must minimize administrative and financial costs. Executives must be allowed to use third party tablets and mobile devices.

Executives must be able to receive inbound calls even under bandwidth constrained situations.

Technical Requirements

You have the following technical requirements. The new Skype for Business solution needs

to replace the existing third-party party dial-in conferencing provider.

Network requirements:

Prioritize Skype for Business traffic on the network where possible. Avoid over-subscription on bandwidth constraint network sites.

Unified Messaging requirements:

Tailspin toys prefers to use voice mail as part of Exchange Online.

Enterprise Voice requirements:

Provide enterprise voice to all users in all locations. Ensure that the solution is highly available.

PSTN connections must be centralized to Melbourne and Singapore. You must implement Call Via Work functionality for specific users.

Question No: 23 – (Topic 5)

You need to solve the Enterprise Voice issue experienced by Sydney users. Which normalization rule should you use for mobile numbers?

A. ^0[45]\((d8))$

B. ^0([45]\d{6})$

C. ^0[45]\d({8})$

D. ^0([45]\d{8})$

Answer: D

Question No: 24 – (Topic 5)

You need to implement the Mediation services solution. What should you do?

  1. Use a collocated Mediation server on the existing Front End Servers in Melbourne and Singapore.

  2. Deploy a new stand-alone Mediation server pool in Melbourne and Singapore.

  3. Deploy a dedicated Mediation server pool at each site.

  4. Deploy a Survivable Branch appliance at each site.

Answer: A

Question No: 25 HOTSPOT – (Topic 5)

You need to configure the Enterprise Voice deployment for the Hong Kong site.

How should you configure the Hong Kong network link? To answer, select the appropriate codec and bandwidth in kilobits per second (Kbps) from the list in the answer area.

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Answer:

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Question No: 26 HOTSPOT – (Topic 5)

You need to configure media bypass for Tailspin Toys.

What should you do? To answer, select the appropriate Media Bypass setting from each list in the answer area.

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Answer:

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Question No: 27 – (Topic 5)

You need to enable all users for voice mail.

Which three configuration steps are required to configure the environment for Exchange

Unified Messaging? Each correct answer presents part of the solution.

  1. Run the OcsUMUtil executable on the Skype for Business server.

  2. Run ExchUCUtil.ps1 on the Exchange server.

  3. Run the New-CsHostingProvider Skype for Business Management Shell cmdlet.

  4. Run the New-CsHostedVoicemailPolicy Skype for Business Management Shell cmdlet.

  5. Apply the hosted voice mail policy to all users.

Answer: A,B,D

Topic 6, Contoso, LTD 2

Contoso, Ltd. is a Canadian business law firm that currently employs 300 people. The company operates a main office in Vancouver that houses 250 employees and a branch office in Seattle that houses 50 employees. All Contoso users are Skype for Business- enabled. Contoso is launching a hybrid configuration of Office 365 to validate the cloud- based Exchange Online service.

Contoso plans to introduce a remote disaster recovery data center to host remote replicas of key services, including Active Directory Domain Services (AD DS), Skype for Business, Exchange, and files and legal software. The company also plans to acquire a small law firm in Vancouver called Litware, Inc., which has 80 employees. Litware currently uses a 10- megabit per second (Mbps) Internet connection.

Half of Litware employees will use Skype for Business services. All Skype for Business- enabled users in Litware will use Instant Messaging only. Currently, Instant Messaging concurrent usage at Litware is 50 percent during peak hours.

There is a possibility that Contoso will make two more acquisitions during the next three years. Vancouver and Seattle employees have submitted support tickets to report poor quality of outbound Skype for Business calls to external users. A user activity report collected by the help desk department is shown in the User Activity Report section.

There is a concern that in the future, the volume of Skype for Business traffic may reach up to 50 percent of the current bandwidth available in the Vancouver office.

User Activity Report

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Existing Environment

The core portion of the infrastructure is located in the Vancouver data center, although the Seattle data center also has two servers (listed below) to provide redundancy of Active Directory and data services.

The following services and applications comprise Contoso’s infrastructure in Vancouver and Seattle.

Vancouver Data Center:

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Seattle Data Center:

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An overview of the network infrastructure of Vancouver and Seattle data centers is shown in the exhibit. (Click the Exhibit button.)

All users in the Vancouver and Seattle offices use the Microsoft Windows 8 Enterprise operating system and phones that are enabled for Enterprise voice.

Contoso expects to see a growing number of remote users. They anticipate that up to 20 percent of users in Vancouver might work remotely.

Contoso has defined a team of 35 users who will participate in a pilot deployment of the Office 365 hybrid configuration.

The offices in Vancouver and Seattle are using 5-Mbps Internet connections. Contoso has a site-to-site VPN between the Vancouver office and the Seattle office.

All external outbound calls from the Vancouver and Seattle offices are routed outside through the office in Vancouver.

Business Requirements

Contoso needs to review the existing network topology as well as the Skype for Business Server 2015 infrastructure to ensure that network capacity is sufficient to accommodate the Litware, Inc. Skype for Business users in the future.

Contoso expects to see up to 85 percent of simultaneous instant messaging, 1% of peer- to-peer traffic and 25 percent of public switched telephone network (PSTN) calls over the WAN during business hours.

All existing issues that relate to poor quality of outbound Skype for Business calls need to be addressed as well.

Contoso wants to ensure the following:

Current network bandwidth allocated to the Vancouver office is sufficient to sustain the future volume of Skype for Business traffic and guarantee high quality of Skype for Business calls.

Volume the Skype for Business traffic does not exceed 25 percent of the WAN bandwidth.

Contoso plans to redesign the existing site-to-site VPN solution between the Vancouver and Seattle offices to implement a robust and reliable WAN solution with end-to-end support of Quality of Service (QoS).

The recommended design solution needs to eliminate the possibility of WAN oversubscription by Skype for Business traffic.

The proposed Skype for Business Server 2015 solution needs to be: Scalable to accommodate the company’s future acquisitions.

Readily available for Vancouver and Seattle users.

In case of a disaster, a manual switchover of Skype for Business services to the disaster recovery datacenter should be available.

Technical Requirements

All Session Initiation Protocol traffic (SIP) traffic must be encrypted.

All external Skype for Business Server 2015 services must be protected by a firewall.

A commercial third-party certificate must be used on the external interface of Skype for Business Server 2015 Edge servers.

The Role-Based Access Control (RBAC) model will be implemented to delegate basic administrative tasks to the Skype for Business help desk team.

All maintenance of Skype for Business servers must be performed outside of business hours.

The proposed architecture solution must support interoperability between Skype for Business Server 2015 and Exchange 2013.

The Skype for Business Bandwidth Calculator must be used to analyze Skype for Business

traffic. The QoS end-to-end support needs to be implemented. Exhibit

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Question No: 28 – (Topic 6)

You need to define the goals that you would like to achieve after you perform usage modeling of Skype for Business traffic.

Which two goals should you establish? Each correct answer presents part of the solution.

  1. Confirm that bandwidth is sufficient for 40 new Litware, Inc. Skype for Business users.

  2. Confirm that the volume of Skype for Business traffic does not exceed 5 megabits per second (Mbps).

  3. Confirm that bandwidth is sufficient for 80 new Litware, Inc. Skype for Business users.

  4. Confirm that the volume of Skype for Business traffic does not exceed 25 percent of wide area network (WAN) bandwidth.

  5. Confirm that bandwidth is sufficient for Microsoft Office 365 Hybrid Skype for Business deployment.

Answer: C,D

Question No: 29 HOTSPOT – (Topic 6)

You need to estimate the volume of Skype for Business traffic.

In the Skype for Business Calculator, which options should you select? To answer, select the appropriate branch site or sites in the Skype for Business Bandwidth Calculator.

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Answer:

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Question No: 30 – (Topic 6)

You need to estimate the future volume of Skype for Business traffic in the Vancouver office.

Which two employee totals should you use for the estimate? Each correct answer presents part of the solution.

  1. 300 employees at Contoso, Ltd.

  2. 80 employees at Litware, Inc.

  3. 40 employees at Litware, Inc.

  4. 35 hybrid users at Contoso, Ltd.

Answer: A,C

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