3Com 3C13636 Configuration Manual page 1438

3Com Router 3000 Ethernet Family
Configuration Guide
[3Com-Serial1/0/0] async mode protocol
[3Com-Serial1/0/0] dialer circular-group 0
# Configure user-interface to enable dial-up mode.
[3Com-Serial1/0/0] user-interface tty1
[3Com-ui-tty1] modem
[3Com-ui-tty1] user-interface tty2
[3Com-ui-tty2] modem
2) Configure RouterB
# Configure dial-up ACL.
[3Com] dialer-rule 1 ip permit
# Configure the asynchronous dial-up mode of Serial0/0/0.
[3Com] interface serial 0/0/0
[3Com-Serial0/0/0] physical-mode async
[3Com-Serial0/0/0] async mode protocol
# Configure Dialer0 interface address, enable C-DCC and the DCC to the peer.
[3Com-Serial0/0/0] ip address 100.1.1.2 255.255.255.0
[3Com-Serial0/0/0] dialer enable-circular
[3Com-Serial0/0/0] dialer-group 1
[3Com-Serial0/0/0] dialer route ip 100.1.1.1 8810048
[3Com-Serial0/0/0] dialer route ip 100.1.1.1 8810049
# Configure user-interface to enable dial-up mode.
[3Com-Serial0/0/0] user-interface tty1
[3Com-ui-tty1] modem
3) Configure RouterC
# Configure dial-up ACL.
[3Com] dialer-rule 1 ip permit
# Configure the asynchronous dial-up mode of Serial0/0/0.
[3Com] interface serial 0/0/0
[3Com-Serial0/0/0] physical-mode async
[3Com-Serial0/0/0] async mode protocol
# Configure Dialer0 interface address, enable C-DCC and the DCC to the peer.
[3Com-Serial0/0/0] ip address 100.1.1.3 255.255.255.0
[3Com-Serial0/0/0] dialer enable-circular
[3Com-Serial0/0/0] dialer-group 1
[3Com-Serial0/0/0] dialer route ip 100.1.1.1 8810048
[3Com-Serial0/0/0] dialer route ip 100.1.1.1 8810049
# Configure user-interface to enable dial-up mode.
[3Com-Serial0/0/0] user-interface tty1
3Com Corporation
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Chapter 1 DCC Configuration