Chapter 1 Introducing the ISG50
ISG50 User’s Guide
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1.1.3.4 N-site
In addition to one of the application scenarios already described, you can also use site-to-site VPNs
to connect ISG50s at multiple locations. This allows peer to peer VoIP calling and faxes over IP
without using an ITSP and remote dial-out to make local calls in different areas. For example, with
ISG50s at offices in the US and Germany, if someone in the US office needs to call someone in
Germany, you can route the call through the Internet and out through the German office so it gets
billed as a local German call.
Figure 5 N-Site Application
1.2 Rack-mounted Installation
The ISG50 can be mounted on an EIA standard size, 19-inch rack or in a wiring closet with other
equipment. Follow the steps below to mount your ISG50 on a standard EIA rack using a rack-
mounting kit. Make sure the rack will safely support the combined weight of all the equipment it
contains and that the position of the ISG50 does not make the rack unstable or top-heavy. Take all
necessary precautions to anchor the rack securely before installing the unit.
Note: Leave 10 cm of clearance at the sides and 20 cm in the rear.
FAX
VPN
ISG
DMZ
LAN
Site 1
Site 2
Site 3
FAX
ISG
DMZ
LAN
VPN
VPN
FAX
ISG
DMZ
LAN
