You are the messaging engineer for your company. Your company has an Exchange Server 2007 messaging system.
Your company has a main office and five branch offices. An Active Directory site exists for each office.
Each office contains three Exchange Server 2007 servers. Each of the servers has the Mailbox server role, the Hub Transport server role and the Client Access server role installed.
Your company plans to integrate voice mail and fax message functionality into to the existing Exchange Server 2007 messaging system. You need to design a plan that meets the following requirements:
All users must be able to receive voice mail and fax messages by using an Exchange client.
All users must have access to new e-mail, voice mail and fax messages in the event that a single Exchange server fails.
What solution should you recommend? (Each correct answer presents part of the solution. Choose two.)
A.
In each office, install and configure a continuous cluster replication solution.
B.
In each office, configure a local continuous replication solution.
C.
In each office, install two servers with the Unified Messaging server role. Add the Unified Messaging
servers to the Unified Messaging dial plan.
D.
In the main office, install six servers with the Unified Messaging server role. Create six dial plans. Add
each server to a dial plan.
E.
In each office, install a server with the Unified Messaging server role. Add a CNAME record for each
Unified Messaging server and configure round robin DNS.
F.
In each office, install a server with the Client Access server role.
Explanation:
Cluster Continuous Replication affords 2007 Mailbox servers a high availability solution, with no special hardware or shared storage requirements and no single point of failure.http://technet.microsoft.com/en-us/library/bb124521.aspx
Dial Plan for a single forest with multiple sites:
Make Unified Messaging deployment resilient by installing multiple UM servers in a single Dial Plan. Your IP Gateways can be configured to retrieve Dial Plan servers from DNS and route calls to them in a round-robin fashion.
Although the UM role has numerous AD components that must be created and configured during deployment, a Dial Plan is the prime object.
A Dial Plan is the logical representation of your phone number scheme. PBX extensions share a common basic number. Therefore, users can call one another without having to dial the full phone number. The Dial Plan is the AD container object representing a PBX set sharing common extensions. Dial Plans are implemented to ensure that phone numbers for users are unique throughout the system.
A user can be a member of only one Dial Plan. All those belonging to the same plan possess:
1. An extension uniquely identifying the mailbox.
2. The ability to call or send voice messages to other members using only an extension number.
To integrate a phone network with UM, you must have IP gateway hardware to link the phone system to your IP network. Gateways convert telephony circuit-switched protocols into IP data-switched ones. Each IP Gateway in AD corresponds to such a hardware gateway.
UM requires that you create at least one Dial Plan that has a UM server and IP gateway associated with it. Each time you create a dial plan, a UM mailbox policy is also be created, named <Dial Plan Name> Default Policy. You can also use a Dial Plan to establish a common policy for some particular group of users. For example, you can enable different languages for different plans.
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http://technet.microsoft.com/en-us/library/bb125151.aspx