About Voice over IP (VoIP)
Network Topology
Introduction | This section describes a typical network topology for the application of VoIP. |
Network Topology Figure 2 illustrates a typical network topology for voice traffic.
Voice Device |
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| IP Network |
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Voice |
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Network |
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PB S200 | PB S200 Destination | PBX |
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Source IP Node | IP Node |
Voice Device
Voice
Network
Figure 2. Example Network Topology
Node Conventions The node conventions described below refer to Figure 2 and are used throughout this document.
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| Convention | Description |
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| Voice Device or Network | The voice device or network sends voice to |
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| the voice port on the source IP node. |
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| Source IP Node | The source IP node is a PathBuilder S200 |
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| series switch that |
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| • connects directly to the voice device. |
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| • connects directly to the IP network. |
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| • connect directly to a frame relay network |
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| supporting voice. |
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| • encapsulates voice received from the |
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| voice device or network using 3Com’s |
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| SoTCP protocol. |
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| • initiates calls to the peer, the destination |
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| IP node. |
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| Destination IP Node | The destination IP node is a PathBuilder |
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| S200 series switch that receives SoTCP |
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| packets sent from the source IP node over the |
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| IP network. The destination IP node |
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| voice traffic to the PBX.The PBX may also |
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| connect to a frame relay network supporting |
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| voice. |
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| PBX | The PBX connects to the destination IP node |
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| and receives voice traffic from it. |
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Voice Over IP | 3 | ||
Revision 5.2 |
