Specifications

Design Consideration for a VoFR Network 11
Figure 6. IBM 2212 Sample Voice Configuration with Multiple HQs and One Branch Office
The above network design is not recommended for the following reasons:
• Branch office router incoming traffic is not controlled by HQ router’s frame
relay PVC to branch router Bc and Be definition, because there are more than
two HQs.
• Branch router incoming traffic is not only from one HQ router’s frame relay
PVC. It could also be interleaved with other PVC traffic.
Figure 7 gives more information about the above network design.
Figure 7. IBM 2212 Sample Voice Configuration Big Pipes to Small Pipe No2
IBM
IBM
IBM
1.5Mbps
1.5Mbps
64kbps
Voice Data
Frame Relay Network
HQ-B
Branch
HQ-A
M edia
Speed
15000 kbps
IBM 2212
HQ-B
Branch
Frame
Relay
Network
Media
Speed
15000 kbps
IBM 2212
Media
Speed
64 kbps
IBM 2212
HQ-A