3Com MSR 50 Series Configuration Manual page 187

Figure 25 Network diagram for RS-DCC application on ISDN
Dialer 0
100 .1 .1.1/24
Router A
BRI1/0
Dialer1
122 .1.1 .1/24
Configuration procedure
Solution 1: Use C-DCC to set up connection via ISDN BRI or PRI and configure
DCC parameters on physical interfaces.
1 Configure Router A
# Configure a dial access control rule for dialer access group 1.
<RouterA> system-view
[RouterA] dialer-rule 1 ip permit
# Assign an IP address to interface BRI 1/0, enable C-DCC, and configure the dial
strings for calling Router B and Router C.
[RouterA] interface bri 1/0
[RouterA-Bri1/0] ip address 100.1.1.1 255.255.255.0
[RouterA-Bri1/0] dialer enable-circular
[RouterA-Bri1/0] dialer-group 1
[RouterA-Bri1/0] dialer route ip 100.1.1.2 8810052
[RouterA-Bri1/0] dialer route ip 100.1.1.3 8810063
2 Configure Router B
# Configure a dial access control rule for dialer access group 2.
<RouterB> system-view
[RouterB] dialer-rule 2 ip permit
# Assign an IP address to interface BRI 1/0, enable C-DCC, and configure the dial
string for calling Router A.
[RouterB] interface bri 1/0
[RouterB-Bri1/0] ip address 100.1.1.2 255.255.255.0
[RouterB-Bri1/0] dialer enable-circular
[RouterB-Bri1/0] dialer-group 2
[RouterB-Bri1/0] dialer route ip 100.1.1.1 8810048
3 Configure Router C
# Configure a dial access control rule for dialer access group 1.
NT 1
8810048
ISDN
8810063
DCC Configuration Example
NT 1
BRI1/0
8810052
NT 1
BRI1/0
187
Router B
Dialer 0
100 .1 .1.2/24
Router C
Dialer 0
122 .1 .1.2/24