Network requirements

As shown in Figure 37, the ATM backbone network uses FR network as the access network to support transmitting traffic of multiple services. A single virtual circuit of an FR link can transport multiple kinds of service data.

The bandwidth of Router A Serial2/0 is 64 kbps. Host A sends data traffic stream 1 to Host C, Host B sends data traffic stream 2 to Host D, and a voice service stream exists between Router A and Telephone A.

The bandwidth of Router B Serial2/0 is 64 kbps. Host C sends data traffic stream 3 to Host A, Host D sends data traffic stream 4 to Host B, and a voice service stream exists between Router B and Telephone B.

To ensure voice quality, fragment the data packets to reduce voice jitter caused by transmission delay. MPoFR is used here, and MP is used to fragment data packets.