ISDN Protocol configuration (1)

1. Integrated digital service network ISDN)
Integrated digital service network (ISDN) is composed of two parts: digital telephone and data transmission services, which are generally provided by the telephone Bureau. The Basic Rate Interface BRI of ISDN) Service provides two B channels and one D channel 2B + D ). The B-channel speed of BRI is 64 Kbps, which is used to transmit user data. The speed of the D-channel is 16 Kbps, which mainly transmits control signals. In North America and Japan, the Primary Rate Interface PRI of ISDN provides 23 B channels and 1 D channel. The total rate can reach 1.544 Mbps, and the D channel rate is 64 Kbps. In Europe, Australia and other countries, the isdn pri provides 30 B channels and 1 64 Kbps D channel, with a total rate of 2.048 Mbps. The isdn pri provided by China's telephone Bureau is 30B + D.
2. Basic commands
　
　
Note: 1. The following table of switch types, domestic switches are generally basic-net3.

3. DDRdial-on-demand routing implemented by ISDN) instance:　

The settings are as follows:
Router1:
Hostname router1
User router2 password cisco
!
Isdn switch-type basic-net3
!
Interface bri 0
Ip address 192.200.10.1 255.255.255.0
Encapsulation ppp
Dialer map ip 192.200.10.2 name router2 572
Dialer load-threshold 80
Ppp multilink
Dialer-group 1
Ppp authentication chap
!
Dialer-list 1 protocol ip permit
!
Router2:
Hostname router2
User router1 password cisco
!
Isdn switch-type basic-net3
!
Interface bri 0
Ip address 192.200.10.2 255.255.255.0
Encapsulation ppp
Dialer map ip 192.200.10.1 name router1 571
Dialer load-threshold 80
Ppp multilink
Dialer-group 1
Ppp authentication chap
!
Dialer-list 1 protocol ip permit
!