SBM powered by Microsoft Lync™ Administrator's Guide 2011-11

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Complete the Setup Wizard
PSTN Configuration
Important Typically, the SBM routes PSTN calls through ports on its telephony cards to
a PSTN carrier. You must set up the Media gateway to manage the PSTN
connections. However, when the SBM uses SIP trunking, PSTN calls bypass
the SBM’s Media Gateway; instead the SBM routes the PSTN calls through its
internal port 2 toward a WAN router that connects to an Internet telephony
service provides (ITSP). If your data center contact has informed you that the
SBM is using SIP trunking only, you do not need to configure the Media
Gateway. Simply click Next, then Next in the Place PSTN Call page, and then
follow the instructions in “Start the Lync Services” on page 2-75. (The data
center engineers should have already configured the SBM for SIP trunking
when they added the SBM to the Lync topology.)
However, if you are using a PSTN connection as a backup for SIP trunking,
you must configure the PSTN settings as explained in the sections below. You
must also complete the PSTN Setup Wizard if your SBM has any FXS ports.
Complete the PSTN Setup Wizard
This section explains how to complete the wizard.
Below are basic guidelines for completing the wizard:
1. Click PSTN Setup Wizard.