Installation & Maintenance Manual 20. Configuring FXS Ports and PSTN Trunks
Version 6.8 173 Microsoft Lync Server
20 Configuring FXS Ports and PSTN Trunks
This section describes how to configure FXS ports and PRI (i.e., E1/T1) or BRI trunks
connected to the PSTN Gateway.
20.1 Enabling FXS Ports and PSTN Trunks
The procedure below describes how to enable the FXS ports and PSTN trunk (E1/T1)
channels of the Enhanced gateway. This is done by defining telephone numbers for the
channels and assigning them to Trunk Groups. To ensure correct routing of IP-to-Tel calls,
you need to define different Trunk Groups for the digital trunk and the FXS module.
To enable the FXS ports and PSTN trunks:
1. Open the Trunk Group Table page (Configuration tab > VoIP menu > GW and IP to
IP > Trunk Group > Trunk Group).
Figure 20-1: Trunk Group Table Page
2. Define the following Trunk Groups:
• Trunk Group #2: PRI module (E1/T1) with one span (1-31 channels)
• Trunk Group #1: FXS module with two FXS channels – Channel 1 with phone
number +17326521000 and Channel 2 with phone number +17326521001
• Those numbers need to be configured as TelUri numbers for analog devices in
Lync environment using the powershell command New-CsAnalogDevice.
3. Click Submit to apply your settings.
4. On the toolbar, click Burn to save the changes to the Enhanced gateway flash
memory.
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