User's Manual 252 Document #: LTRT-68822
Mediant 2000
4. Save the settings to flash memory ("burn") with a device reset (see 'Saving
Configuration' on page 396).
20.2.3 Step 3: Define a Trunk Group for the Local PSTN
For incoming and outgoing local PSTN calls with the IP-PBX, you need to define the Trunk
Group ID (#1) for the T1 ISDN trunk connecting the device to the local PSTN. This Trunk
Group is also used for alternative routing to the PSTN if connectivity with the ITSP fails.
To configure the Trunk Group for local PSTN:
1. Open the Trunk Group Table page (Configuration tab > VoIP menu > GW and IP to
IP > Trunk Group > Trunk Group).
2. Configure Trunk Group ID #1 (as shown in the figure below):
• From the 'From Trunk' and 'To Trunk' drop-down lists, select 1 to indicate Trunk 1
for this Trunk Group.
• In the 'Channels' field, enter the Trunk channels or ports assigned to the Trunk
Group (e.g. 1-31 for E1 and 1-24 for T1).
• In the 'Phone Number' field, enter any phone number (logical) for this Trunk (e.g.
1000).
• In the 'Trunk Group ID' field, enter "1" as the ID for this Trunk Group.
Figure 20-7: Defining a Trunk Group for PSTN
3. Configure the Trunk in the Trunk Settings page (Configuration tab > VoIP menu >
PSTN > Trunk Settings).
20.2.4 Step 4: Configure the Proxy Sets
The Proxy Sets represent the actual destination (IP address or FQDN) to which the call is
routed. These Proxy Sets are later assigned to IP Groups (see 'Step 5: Configure the IP
Groups' on page 254).
This step describes how to configure the following Proxy Sets:
Proxy Set ID #1 with two FQDN's for ITSP-A
Proxy Set ID #2 with two IP addresses for ITSP-B
Proxy Set ID #3 with an IP address for the IP-PBX
To configure the Proxy Sets:
1. Open the Proxy Sets Table page (Configuration tab > VoIP menu > Control
Network > Proxy Sets Table).
2. Configure Proxy Set ID #1 for ITSP-A:
a. From the 'Proxy Set ID' drop-down list, select 1.
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