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This article describes the steps necessary to modify the

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Topology After

SBC Configuration Changes

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Media List

1. In the WebUI, click the Settings tab.

2. In the left navigation pane, go to Media > Media List > (relevant media list entry).

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   This is the Media List specified in the SIP Signaling Group above.

3. Change the Crypto SDES-SRTP Profile ID value to None as shown below.

SIP Server Table

1. In the WebUI, click the Settings tab.
2. In the left navigation pane, go to SIP > SIP Server Tables >(relevant SIP Server Table Entry).
3. Change the Port value to 5068, as shown below.

4. Change the Protocol value to TCP, as shown below.

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Lync Changes (Topology Builder)

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1. Log into the Lync front end server PC.
2. Launch the Lync Server 2010 Topology Builder.
3. In the Navigation Tree, go to Branch Sites > PSTN gateways > (relevant SBC entry).
4. Right-click the relevant SBC.
5. Select Edit Properties...
6. Change the Listening Port for IP/PSTN gateway to 5068, as shown below.
7. Change the SIP Transport Protocol to TCP, as shown below.

8. Click OK.

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   1	PSTN Gateway Properties Change

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Publish Topology

To publish the topology:

1. In the Topology Builder navigation tree, right-click Lync Server 2010.

2. Select Publish Topology....

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   Caption 0 Figure 1 Publish Topology Image Modified

Lync Mediation Server Service Restart

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