ZyXEL ISG50-PSTN User Guide - Page 143

Chapter 8 PBX Tutorials 8.3 Making PSTN Calls The following section shows you how to make and receive calls via a connection to the PSTN. This example covers: • The PSTN Connection - configuring the outbound line group (connection settings) from the FXO ports to the PSTN. • Creating a Dialing Rule for PSTN - creating a rule which tells the ISG50 when to use the PSTN connection when completing outbound calls. • Assigning an LCR to an Authority Group - giving extensions the right to make outbound calls via the PSTN connection. Figure 117 Making a PSTN Call Caller dials 05555555 The ISG50 matches this number with an LCR, applies an offset (strips off the 0) and routes the call to PSTN. PSTN 5555555 ISG 1001 8.3.1 The PSTN Connection This example assumes that the ISG50 has an FXO interface already connected (refer to the Quick Start Guide) and that you have connected your telephone cables to the outlets that connect to your local telephone company. The front of your ISG50 should look as shown in the following figure. In this example, ports 1-4 are used for the connections. You will use this information in a web configurator screen later. Figure 118 FXO Connection PSTN SYS FXO 1 2 3 4 ISG50 User's Guide 143