Modem management configuration example

A device is connected to a Cisco router through its Serial 2/0 interface and two modems. A connection between the two devices is established through DCC dialup when data is to be transmitted between them. For more information about DCC dialup, see "Configuring DCC."

1. Configure Router:

   # Create dialer access group 1 and configure it to permit all IP packets.

   <Router> system-view
   [Router] dialer-rule 1 ip permit
   

   # Configure interface Serial 2/0 to operate in asynchronous mode and then configure it to operate in protocol mode.

   [Router] interface serial 2/0
   [Router-Serial2/0] physical-mode async
   [Router-Serial2/0] async mode protocol
   

   # Configure the link layer protocol of interface Serial 2/0 as PPP.

   [Router-Serial2/0] link-protocol ppp
   

   # Configure an IP address for interface Serial 2/0.

   [Router-Serial2/0] ip address 1.1.1.1 255.255.0.0
   

   # Enable C-DCC on interface Serial 2/0.

   [Router-Serial2/0] dialer enable-circular
   

   # Assign interface Serial 2/0 to dialer access group 1.

   [Router-Serial2/0] dialer-group 1
   

   # Set the link holddown timer to 5 seconds.

   [Router-Serial2/0] dialer timer enable 5
   

   # Configure the dial number for placing calls to a single remote end as 666666.

   [Router-Serial2/0] dialer number 666666
   [Router-Serial2/0] quit
   

   # Enables both modem call-in and modem call-out on user-interface TTY 1.

   [Router] user-interface tty 1
   [Router-ui-tty1] modem both
   

   For information about DCC commands, see HPE FlexNetwork MSR Router Series Comware 5 Layer 2—WAN Command Reference.

2. Configure the Cisco router:

   For more information, see Cisco documentation.