70-333 Deploying Enterprise Voice with Skype for Business
Trey Research is a global marketing research organization that has a main office in Moscow and branch offices in Los Angeles, London, Berlin,
Copenhagen, and Jakarta.
The number of users per office is shown below:
Existing systems and telephones
The company has existing IP-PBX systems that are reaching end of life. They use an automatic call distribution (ACD) system for their help desk. This
system provides interactive voice response options to users so that they can choose the location for support. This system is also reaching end of life.
The Copenhagen office uses a call group pickup solution that runs on an existing IP-PBX system. All users with the exception of users in Copenhagen
have Direct Inward Dialing (DID) numbers.
Trey Research has Skype for Business Enterprise pools in the Moscow, London, and Berlin offices, respectively. They run a Unified Communications
Managed API (UCMA) based application in a trusted application pool.
All users in Trey Research are using Aries phones. Users authenticate by using PIN codes.
Quarterly global town hall meetings
Executives conduct global town hall meetings each quarter. Each meeting occurs in a different office. Employees attend the global town hall meetings in
meeting rooms which are equipped with full high definition (HD) screens for video. Ten percent of the employees attend the audio portion of the global
town hall meetings from their desk.
Trey Research plans to implement Skype for Business Enterprise Voice across the company to replace the existing IP-PBX systems.
You must use the following typical bandwidth values to determine the bandwidth requirements in kilobits per second (Kbps) for the solution:
Video resolution bandwidth:
Audio codec bandwidth:
You have the following requirements:
You must reduce international long distance calling costs, and lower support and administration costs for the IP-PBX and ACD solutions.
You must implement voice survivability for all the sites in case of a wide area network (WAN) link failure.
Where possible, you must optimize media paths.
The solution must be resilient to the failure of mediation server pools.
The maximum concurrent peer-to-peer connections between Moscow and Berlin will be 196.
Response groups must be managed by dedicated response group administrators.
Existing gateways do not support the REFER method. You must use the existing gateways with Skype for Business to provide PSTN connectivity.
In the event of a failure of both gateways at any office, all international calls from that office must route through the Moscow gateways.
All calls placed to Russia from any office must route through the Moscow gateways.
Germany experiences high public switched telephone network (PSTN) call volume. All calls for Germany must breakout from Berlin in the event of
Mediation Server pool failure in Berlin.
All PSTN calls to Germany must use Berlin gateways in the event of Mediation Server pool failure in Berlin.
You test the Enterprise Voice solution with users in the Copenhagen office. During testing, users reported audio call issues related to the Call Admission
Control (CAC) configuration. The relevant portion of the current configuration is shown in the Table below:
You create the following policies:
Two users who recently joined the company’s finance department report that they are not able to use their Aries phones even when they tether the
phone to their computer.
You are planning the Peer-to-Peer (P2P) audio bandwidth requirements for the Berlin wide area network (WAN) connection.
You need to calculate the bandwidth usage network impact of P2P audio calls between Berlin and Moscow.
What is the minimum bandwidth in megabits per second (Mbps) required for P2P calls between Berlin and Moscow?
A. 8.7 Mbps
B. 7.8 Mbps
C. 9.1 Mbps
D. 6.1 Mbps
Correct Answer: A
Silk Wideband is used for P2P audio. 44.3 kbps x 196 maximum users = 8.7 Mbps.
Users in Copenhagen report frequent audio call issues.
You need to resolve the issues.
Which three actions should you perform? Each correct answer presents part of the solution.
A. Create a new region link between the MPLS region and the Berlin region.
B. Create and configure a new network region and assign only Copenhagen to this region.
C. Create an inter-site policy which includes Copenhagen and Moscow and specify the existing BandwidthPolicyProfile “LOW”.
D. Create an inter-site policy which includes Copenhagen and Berlin and apply the existing BandwidthPolicyProfile “LOW”.
E. Create and configure a new network region and assign Berlin and Copenhagen to this region.
Correct Answer: CDE
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.
A. Disable REFER support.
B. Enable media bypass.
C. Set Encryption Support Level to required.
D. Enable centralized media processing.
Correct Answer: AB
You need to ensure that the new finance department users can sign in to the Aries phone without tethering the phone to their computer.
Which two actions should you perform?
NOTE: Each correct answer presents part of the solution.
A. Assign a PIN for the users by running the Set-CsClientPin Skype for Business Management Shell command. Inform users about the new PIN.
B. Tell users to log on to the device with their Active Directory Domain Services (AD DS) credentials and then set a Device Lock PIN.
C. Tell users to sign in to the phones with their Active Directory Domain Services (AD DS) credentials.
D. Tell users to change their PIN by using the dial-in conferencing webpage.
Correct Answer: AD
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?
A. Create a trunk translation rule that masks the calling number.
B. Use the voice gateway to mask the calling number.
C. Create a new normalization rule and add it to the pool dial plan.
D. Use the telecommunications provider to mask the calling number.
E. Use the Skype for Business control panel to mask the calling number.
Correct Answer: A