ISG50 User’s Guide 477
CHAPTER 30
Outbound Trunk Group
30.1 Overview
This covers you how to manage outside lines on the ISG50.
The following diagram shows the ISG50 connected to the various types of outside connections:
• FXO/BRI Trunk (A): shows the ISG50 connected to the PSTN (Public Switched Telephone
Network) or ISDN (Integrated Service Digital Network) via an FXO/BRI port on the ISG50. You
can also use the FXO ports to connect to a traditional analog PBX or use the BRI port to connect
to a basic rate interface, if your organization has one.
• SIP Trunk (B): shows the ISG50 connected to a SIP gateway at your VoIP service provider (ITSP:
Internet Telephony Service Provider). You can use the SIP trunk to connect to a SIP gateway on
which you have an existing SIP account.
•Trusted Peer (C): shows the ISG50 connected to another ISG50 (for example, at your branch
office). You can establish a trusted peer connection with another SIP server that lists your ISG50
as a trusted peer.
Figure 306 Outbound Line Overview
30.1.1 What You Can Do in this Chapter
•Use the Outbound Trunk Group screens (starting in Section 30.2 on page 481) to manage the
outside lines on the ISG50.
•Use the Auto-Attendant screens (starting in Section 31.2 on page 505) to configure the default
and customized auto-attendants the ISG50 uses.
PSTN
ITSP
B
A
C
/ISDN