ZyXEL ISG50-PSTN User Guide - Page 89

Chapter 6 Configuration Basics • Auto-Attendant - This is a feature which routes incoming calls to their proper extension. An auto-attendant is assigned to each outbound line group and it services incoming calls on those lines. If your organization has two outbound line groups, each with a specific telephone number for incoming calls, then you can assign a different auto-attendant for each incoming line. Assign one auto-attendant for general calls to the extensions in your organization (for example AA1) and one auto-attendant for direct routing to a FAX machine (for example FAX). Figure 63 Auto-Attendant 555-0002 FAX ISG 555-0001 AA1 Please dial the extension you would like to reach. 2001 1001 1002 1003 6.1.2 Internal Call Routing Internal call routing refers to calls between extensions on the ISG50. People simply dial the extension they want to call. The ISG50 checks to see if the number dialed is an existing extension and forwards the call to that extension. The ISG50 by default allows people with extensions from one authority group to call extensions in another authority group. You can, however, block calls between authority groups if your organization requires such a setting. The configuration requirement for setting up internal call routing are: 1 Create an authority group. 2 Create extensions in the authority group. 6.1.3 Outbound Call Routing Outbound call routing refers to calls originating from an extension on the ISG50, going via an outbound line group to a telephone outside your organization. Outbound call routing requires that an authority group is linked to an outbound line group. The link between the two is an LCR (Least Cost Routing). LCRs contain the dialing rules for outbound line groups. Authority groups need to be associated to LCRs to gain access to the outbound line groups. ISG50 User's Guide 89