SIP User's Manual 560 Document #: LTRT-12804
Mediant 800 MSBG
8.4.10.3 SBC-to-PSTN Routing
This section describes how to setup the device for SBC-to-PSTN routing. This example is
based on the general scenario described in ''General SBC Setup'' on page 546, but in
addition assumes the following:
The device is connected to the PSTN network by an E1/T1 trunk
Analog POTS phones are connected directly to the device using the device's FXS
module
Figure 8-74: SBC-to-PSTN Routing Example Setup
8.4.10.3.1 Step 1: Add SIP Interface for PSTN
The procedure below describes how to configure a SIP signaling interface for the PSTN.
This SIP interface is configured for the "GW/IP2IP" application using port 5070 on the LAN
SRD. Note that this SIP interface is in addition to those previously defined in ''General SBC
Setup'' on page 546.
¾ To configure a SIP interface for the PSTN:
1. Open the 'SIP Interface Table' page (Configuration tab > VoIP menu > Control
Network submenu > SIP Interface Table).
2. In the 'Add' field, enter 3, and then click Add.
3. In the 'Network Interface' field, enter "Voice". Note: This string must be identical (and
case-sensitive) as that defined in the 'Multiple Interface' table for the 'Interface Name'
field (see ''Step 1: Configure LAN VoIP IP Address'' on page 547).
4. From the 'Application Type' drop-down list, select 'GW/IP2IP'.
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