Issue 6.0
NEC SL1100
6 - 10
Network Design Considerations
The diagram below is example of how a VPN tunnel may be implemented.
The red lines in the diagram show the tunnels that are created through the
Internet. Each network can connect to the others as though they are
connected with private connections (kilostream, etc.), without the issues
relating to NAT.
When IP address translation is applied to a VoIP packet, the application fails
and the communication path is broken. VoIP packets contain the IP address
information and the ports used as part of its payload. When NAT is applied,
only the header parameter is changed, not the payload data that affects the
process of data packets within the VoIP switch and terminal.
Figure 6-2 Virtual Private Network (VPN) Example
Internet
ADSL
Router
Firewall/
VPN
ADSL
Router
Firewall/
VPN
AD
SL
AD
SL
DSL /
Cable / Dialup
SL1100
Head Office LAN
Home Office LAN
Mobile Workers
(Software VPN Client)
Summary of Contents for SL1100
Page 1: ...Networking Manual NDA 31190 Issue 6 0 SL1100...
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Page 22: ...Issue 6 0 NEC SL1100 1 2 Introduction THIS PAGE INTENTIONALLY LEFT BLANK...
Page 62: ...Issue 6 0 NEC SL1100 5 30 Programming THIS PAGE INTENTIONALLY LEFT BLANK...
Page 94: ...Issue 6 0 NEC SL1100 6 32 Network Design Considerations THIS PAGE INTENTIONALLY LEFT BLANK...
Page 134: ...Issue 6 0 NEC SL1100 8 10 DHCP Client THIS PAGE INTENTIONALLY LEFT BLANK...
Page 159: ...NEC SL1100 Issue 6 0 Networking Manual 9 25 Figure 9 7 Log In to IP Phone...
Page 181: ...NEC SL1100 Issue 6 0 Networking Manual 9 47 Figure 9 25 IP System Operation Setup...
Page 206: ...Issue 6 0 NEC SL1100 9 72 IP Multiline Station SIP Figure 9 36 NAPT Configuration Example...
Page 230: ...Issue 6 0 NEC SL1100 10 18 IP Single Line Telephone THIS PAGE INTENTIONALLY LEFT BLANK...
Page 232: ...Issue 6 0 NEC SL1100 11 2 NAPT Figure 11 1 NAPT Configuration Example...
Page 242: ...Issue 6 0 NEC SL1100 12 4 All DSP Busy Indication THIS PAGE INTENTIONALLY LEFT BLANK...
Page 290: ...Issue 6 0 NEC SL1100 13 48 SL Net THIS PAGE INTENTIONALLY LEFT BLANK...
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Page 292: ...SL1100 Networking Manual NEC Corporation of America Issue 6 0...