This article describes the process of configuring an SBC Edge (SBC) to be deployed Upstream in a PSTN - SBC - Microsoft Exchange 2007/2010 Unified Messaging Server environment. In this example the SBC serves as a gateway between the PBX, Exchange Unified Messaging Server, and the PSTN; none of which are directly connected to the other:
The diagram below illustrates the topology and a typical call scenario:
Topology |
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Launch the WebUI and verify the node level settings:
Verify Node Level Settings
The SBC integration with the MS Exchange 2007/2010 Unified Messaging Server requires specific configuration steps to be completed using the WebUI to allow it to function properly in the topology described above.
Navigation Plan Overview
Configure the new SIP Server Tableas shown in the illustration below.
Configure SIP Server Table
In the left navigation pane, click the Transformation table created in the previous step.
Add Transformation Table
Transformation Rule - Reach PBX Endpoints
Transformation Rule - Reach PSTN Phones
Transformation Rule - Reach SA/AA Numbers
Transformation Rule - Reach Called Party's Voicemail (VM) box
Create two more entries. Name them Calls from Exch and Calls From PSTN.
In this deployment, three call route table entries are required for the relevant Signaling Groups.
Add Call Routing Table Entry
This table requires two entries:
Route Table - Calls From PBX Phones
This table requires two entries:
Route Table - Calls From Exchange Server
This table requires two entries:
Route Table - Calls From PSTN Phones
Complete the fields as shown below.
Note that you will have to configure two Ports here, one for T1 connection to PBX, and another for T1 connection to PSTN, which will eventually be used in the relevant ISDN Signaling Groups
Port Configuration
Click OK.
ISDN Signaling Group - PBX Connection
Click OK.
SIP Signaling Group - Exchange 20xx Unified Messaging Server Connection
Click OK
ISDN Signaling Group - PSTN Connection
At this point, the Signaling Groups should appear like so:
Signaling Groups
Configure the Clock Source either as System or the Network, depending on your PBX timing settings.
In this exercise, the SBC node is reading the system time from the network therefore the configuration is done as shown below:
For more information about system timing see, Configuring the System Clock Source
Configure System Timing
After having completed the configuration steps above, and the relevant configuration on Exchange 20xx Unified Messaging Server, verify the signaling group status:
Verify that all three Ports come up as shown below:
Verify Signaling Group Status