Vanguard Managed Solutions Vanguard 6435 - Handbuch (Seite 27)

About the Vanguard 6435/6455 1-9
Applications
Voice over Frame
Relay or Voice over
IP The Vanguard 6435 and Vanguard 6455 can support Voice over Frame Relay (VoFR)
or Voice over IP (VoIP) as shown in Figure 1-4. In this example, the Vanguard 6435
supports multiple voice lines in the remote branches, which can be set up as
extensions on a PBX. These voice connections can be routed over Frame Relay or
over IP, or routed over both transmission paths. The Frame Relay link can provide a
high-speed connection between branches and the head office for voice and data. The
LAN (Ethernet) link connects the Vanguard 6435 with the Internet Service Provider
(ISP) to provide the IP link (for a possible company Intranet).
Figure 1-4. Voice over Frame Relay or Voice over IP
Virtual Private
Network through
Data Encryption This application example (Figure 1-5) shows how a Virtual Private Network (VPN)
can be created by encrypting data before it is transmitted over Frame Relay or X.25
networks. There is no security and privacy for unencrypted data as it moves from one
location to another through the public network. After encryption, the Vanguard 6435
offers secure transmission of data over any shared public medium, creating a virtual
private network.
Figure 1-5. Virtual Private Network through Encryption
Frame Relay
Server
PBX
Controller
IP/Intranet
LAN
Remote Branches
LAN
Headquarters
Vanguard 6435 Vanguard 6435
Frame Relay
Server
or X.25
Server
1s$6g
Data
ABCDE
Data
ABCDE
Encrypted Data
Vanguard 6435 Vanguard 6435