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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
outside lines on the ISG50.
• Use the Auto-Attendant screens (starting in
and customized auto-attendants the ISG50 uses.
ISG50 User's Guide
C
HAPTER
Outbound Trunk Group
PSTN
/ISDN
A
ITSP
B
C
Section 30.2 on page
Section 31.2 on page
3 0
481) to manage the
505) to configure the default
477
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Troubleshooting
