NEC SL1100
Issue 6.0
Networking Manual
9 - 45
freely with each other. When building the VPN tunnels, throughout the
network, they must be assigned as a fully meshed network. This means that
every network is allowed direct connection to each and every other network in
the topology. Network equipment limitations may sometimes restrict this
ability resulting in no voice path on VoIP calls between sites. When this
happens Peer-to-Peer must be disabled in the SL1100. The downside to
disabling Peer-to-Peer is using more DSPs and consumption of additional
bandwidth at the MAIN location.
The following diagram shows three sites connected together via VPN. This
network is not fully meshed due to the lack of a VPN tunnel between Sites B
and C.
With Peer-to-Peer enabled, the IP phones on site A can communicate with IP
phones on sites B and C. IP Phones on sites B and C cannot communicate
directly with each other though. The IP phone from site B can set up a call to
the IP phone at site C, but there is no speech path. Here are the steps in the
call scenario leading to the failed call.
Extension 120 goes off hook and dials ext 130.
An initial invite message is sent from 192.168.2.15 (ext 120) to
192.168.1.10 (VoIPDB).
192.168.1.10 (VoIPDB) forwards that message to 192.168.3.26 (ext
130).
Figure 9-24 NEC SL1100 Network Example No. 2
VoIPDB IP Address =
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...
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Page 292: ...SL1100 Networking Manual NEC Corporation of America Issue 6 0...