M6 MRAT Flashcards
Name five or more features that Enterprise Voice and PBXs have in common. Is Lync Server 2010 capable of replacing a PBX? Why or why not?
Hold, transfer, conference, Call Park, vacant number routing, etc. Lync Server 2010 is definitely capable of replacing a PBX and has many advantages over a PBX.
How does media bypass affect Enterprise Voice in Lync Server 2010? What types of calls are eligible for media bypass? Are conference calls eligible for media bypass?
Media bypass enables media traffic to pass directly from the PSTN drop-off to the Lync 2010 client endpoint without traversing the Mediation server. Only point-to-point calls are eligible for bypass, and only if the Lync 2010 endpoint has the same bypass ID as the PSTN gateway/IP-PBX. Conference calls are not eligible for media bypass.
What types of PSTN connectivity are possible for Enterprise Voice? Which option doesn’t require any additional on-premise hardware? What are the pros and cons of each option?
PSTN gateway/IP-PBX/SIP trunk. SIP trunk.
Some telephony vendors do not deliver inbound calls with the dial string formatted as E.164
Work with the telephony vendor to get the dial strings formatted as E.164, or select a new telephony vendor certified by the Microsoft Unified Communications Open Interoperability Program (OIP).
Dial strings do not normalize as expected
Use the Lync Server Control Panel to set up a test case to see what rules are matching and applying formatting. The order of the normalization rules may need to be adjusted.
Users should be prevented from calling toll numbers starting with 900
Normalization rules and routes can be configured to reject numbers by including an exclamation mark preceding what should be rejected; e.g., ^(!900)\d+$.
Contoso has two offices connected by a private T1 connection. Each office also has a 100-megabit Internet connection. The T1 connection should be preferred for voice traffic for its low latency, but it is only capable of handling 50 percent of the concurrent calls between offices. What service should Contoso configure to take advantage of the T1 connection but also allow all calls to be made? How should it be configured?
Call Admission Control (CAC) should be implemented to limit calls placed on the T1 connection; PSTN reroute does not need to be enabled, as calls will automatically attempt to route over the Internet if the T1 connection reaches the CAC-imposed limit.
Fabrikam has a branch office with 600 users connected to the central office by a single WAN link. The branch office has a direct connection to the PSTN and a local administrator who has been trained in Lync Server 2010. In the event of WAN link failure, the branch office must maintain the ability to make PSTN calls. What options are available for voice resiliency?
Small Branch Appliance and Small Branch Server are the two options we would expect to come up as possibilities here. There are other viable options as well, but at a much higher infrastructure cost.
: Wingtip Toys would like to route certain calls to a group of people and have identified team call, Response Group Services, and Call Park as viable options. What are the advantages and disadvantages of each approach, and which approach might be best for Wingtip Toys?
RGS advantages: anonymity, IVR potential, business hours, routing algorithms; disadvantages: more difficult to configure, dependency on other services. Team call advantages: easy to configure; disadvantages: no customizability. Call Park advantages: moderately easy to configure, anyone can take call; disadvantages: limited customizability, have to communicate call number
Best Practices Related to aParticularTechnologyAreainThisModule
- Where possible, configure your normalization rules to normalize dial strings to E.164 format.
- Leverage the Microsoft Unified Communications Open Interoperability Program (OIP) when selecting hardware or telephony partners for Enterprise Voice.
- Monitor your Enterprise Voice infrastructure with the Quality of Experience Monitoring server.
The Pre-Call Diagnostics tool
Test network quality for voice traffic. The tool tests the connection directly back to the Lync Server 2010infrastructure and provides statistics on packet loss, jitter, and even scores the statistics with a mean opinion score (MOS).
Lync Server Control Panel
Allows Lync Server 2010 administrators to configure and run test cases to verify proper execution of normalization rules, usages, and routes
Lync Server 2010 has a number of synthetic transactions, such as TestCsPstnOutboundCall
Make test calls
