Configuring UM Environment
UM requires several Active Directory directory Service objects to be created and configured for Unified Messaging to function properly. The steps for doing this are as follows:
1. Create a Dial Plan Active Directory object.
2. Create a Unified Messaging IP Gateway Active Directory object and associate with Dial Plan Active Directory object.
3. Create a Hunt Group Active Directory object and associate it with the Unified Messaging IP Gateway.
4. Associate Unified Messaging Server object with the Dial Plan.
5. Enable Unified Messaging role on the Exchange Server. At this point Unified Messaging server discovers all VOIP / IP Gateway associated with the Dial Plan. A default Unified Messaging Mailbox policy is created each time you create a Unified Messaging Dial Plan.
6. Enable users and associate them with the Mailbox Policy
What is Dial Plan?
Dial plan is an Active Directory object that logically represents group of PBX or IP/PBX systems that share common user extension numbers. Dial Plans are used to establish common set of policies for a set of users. Users who belong to the same Dial Plan have:
1. An extension number that uniquely identifies the user mailbox in Dial Plan.
2. The ability to call or send Voice messages to other members in Dial Plan by the extension numbers.
Users can be member of one Dial Plan. Each time a Dial Plan is created Unified Messaging policy by the name ofDefault Policy gets created. Dial Plan can be configured with the Following topologies:
· Single Dial Plan using one PBX
· Single Dial Plan with multiple PBXs
· Multiple Dial Plan with one PBX
· Multiple Dial Plan with Multiple PBXs
Role of IP Gateway
IP Gateway is the container that logically represents a physical IP gateway that can be used to process Unified Messaging calls. The combination of IP Gateway and Unified Messaging Hunt Group establishes a logical link between an IP / VOIP Gateway device and Unified Messaging Dial Plan. For IP / VOIP Gateway to process calls it must be associated with atleast one Dial Plan, while that Dial Plan must be associated with one Unified Messaging Server. So if IP / VOIP Gateway is deleted Unified Messaging Server associated with it will no longer be able to process call request from Unified Messaging IP Gateway.
Unified Messaging IP Gateway Active Directory object consists of Unified Messaging Hunt Groups and IP Gateway configuration settings. When a call comes to the IP Gateway it forwards the call to the associated Unified Messaging Server. The Unified Messaging server then matches
the extension number within the scope of associated Dial Plan
Role of Unified Messaging Hunt Group
Unified Messaging Hunt Group is a group of extension numbers that are grouped in a single logical unit. Each Hunt group that is created on PBX or IP/PBX uses Pilot number to locate the Hunt Group and extension numbers on which the incoming call was received with. Without a defined Pilot number PBX or IP/PBX cannot locate the device to terminate the call. When an incoming call is answered, the call is redirected to the Hunt Group and then to the Unified Messaging Gateway and finally to the Exchange Unified Messaging Server. Unified Messaging Hunt Groups are used to locate the PBX or IP/PBX hunt Group from which the incoming call was received.
A Pilot number that is defined for a Hunt Group in the PBX or IP/PBX must also be defined within the Unified Messaging Hunt Group whenever a single gateway is connected to multiple PBXs and, therefore multiple Dial Plans. The Pilot number is used to match the information presented for incoming calls through the SIP signaling information on the message. The Pilot number allows the Unified Messaging Server to interpret the call and the correct Dial Plan. So the call can be located correctly. It is very important to configure the Unified Messaging Hunt Groups correctly because incoming calls that do not correctly match the Pilot number defined on the Unified Messaging Hunt Groups are not answered.
Role of Exchange Unified Messaging Server
The Exchange Unified Messaging Server Active Directory object is the logical representation of the physical server on which Unified Messaging role is installed. The Unified Messaging Server processes and routes incoming calls correctly to the Unified Messaging enabled users only if it is associated with atleast on Unified Messaging Dial Plan and the Unified Messaging Dial Plan is associated with atleast with one Unified Messaging IP Gateway.
Role of Exchange Unified Messaging Mailbox Policy
Unified Messaging Mailbox policy are used for applying and standardizing Unified Messaging configuration setting such as PIN policies, Dial restriction and other general Unified Messaging Mailbox policy property for Unified Messaging enabled users. When a user is enabled for Unified Messaging, you set the Unified Messaging property on the user’s mailbox object such as Associated Dial Plan, Associated Mailbox Policy and extension number.
UM requires several Active Directory directory Service objects to be created and configured for Unified Messaging to function properly. The steps for doing this are as follows:
1. Create a Dial Plan Active Directory object.
2. Create a Unified Messaging IP Gateway Active Directory object and associate with Dial Plan Active Directory object.
3. Create a Hunt Group Active Directory object and associate it with the Unified Messaging IP Gateway.
4. Associate Unified Messaging Server object with the Dial Plan.
5. Enable Unified Messaging role on the Exchange Server. At this point Unified Messaging server discovers all VOIP / IP Gateway associated with the Dial Plan. A default Unified Messaging Mailbox policy is created each time you create a Unified Messaging Dial Plan.
6. Enable users and associate them with the Mailbox Policy
What is Dial Plan?
Dial plan is an Active Directory object that logically represents group of PBX or IP/PBX systems that share common user extension numbers. Dial Plans are used to establish common set of policies for a set of users. Users who belong to the same Dial Plan have:
1. An extension number that uniquely identifies the user mailbox in Dial Plan.
2. The ability to call or send Voice messages to other members in Dial Plan by the extension numbers.
Users can be member of one Dial Plan. Each time a Dial Plan is created Unified Messaging policy by the name of
· Single Dial Plan using one PBX
· Single Dial Plan with multiple PBXs
· Multiple Dial Plan with one PBX
· Multiple Dial Plan with Multiple PBXs
Role of IP Gateway
IP Gateway is the container that logically represents a physical IP gateway that can be used to process Unified Messaging calls. The combination of IP Gateway and Unified Messaging Hunt Group establishes a logical link between an IP / VOIP Gateway device and Unified Messaging Dial Plan. For IP / VOIP Gateway to process calls it must be associated with atleast one Dial Plan, while that Dial Plan must be associated with one Unified Messaging Server. So if IP / VOIP Gateway is deleted Unified Messaging Server associated with it will no longer be able to process call request from Unified Messaging IP Gateway.
Unified Messaging IP Gateway Active Directory object consists of Unified Messaging Hunt Groups and IP Gateway configuration settings. When a call comes to the IP Gateway it forwards the call to the associated Unified Messaging Server. The Unified Messaging server then matches
the extension number within the scope of associated Dial Plan
Role of Unified Messaging Hunt Group
Unified Messaging Hunt Group is a group of extension numbers that are grouped in a single logical unit. Each Hunt group that is created on PBX or IP/PBX uses Pilot number to locate the Hunt Group and extension numbers on which the incoming call was received with. Without a defined Pilot number PBX or IP/PBX cannot locate the device to terminate the call. When an incoming call is answered, the call is redirected to the Hunt Group and then to the Unified Messaging Gateway and finally to the Exchange Unified Messaging Server. Unified Messaging Hunt Groups are used to locate the PBX or IP/PBX hunt Group from which the incoming call was received.
A Pilot number that is defined for a Hunt Group in the PBX or IP/PBX must also be defined within the Unified Messaging Hunt Group whenever a single gateway is connected to multiple PBXs and, therefore multiple Dial Plans. The Pilot number is used to match the information presented for incoming calls through the SIP signaling information on the message. The Pilot number allows the Unified Messaging Server to interpret the call and the correct Dial Plan. So the call can be located correctly. It is very important to configure the Unified Messaging Hunt Groups correctly because incoming calls that do not correctly match the Pilot number defined on the Unified Messaging Hunt Groups are not answered.
Role of Exchange Unified Messaging Server
The Exchange Unified Messaging Server Active Directory object is the logical representation of the physical server on which Unified Messaging role is installed. The Unified Messaging Server processes and routes incoming calls correctly to the Unified Messaging enabled users only if it is associated with atleast on Unified Messaging Dial Plan and the Unified Messaging Dial Plan is associated with atleast with one Unified Messaging IP Gateway.
Role of Exchange Unified Messaging Mailbox Policy
Unified Messaging Mailbox policy are used for applying and standardizing Unified Messaging configuration setting such as PIN policies, Dial restriction and other general Unified Messaging Mailbox policy property for Unified Messaging enabled users. When a user is enabled for Unified Messaging, you set the Unified Messaging property on the user’s mailbox object such as Associated Dial Plan, Associated Mailbox Policy and extension number.
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