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Configuring a USB Modem Interface for Dial Backup

To configure a USB modem interface for the Services Router:

  1. Navigate to the top of the interfaces configuration hierarchy in either the J-Web or CLI configuration editor.
  2. Perform the configuration tasks described in Table 76.
  3. Go on to Configuring a Dialer Interface for USB Modem Dial Backup.

Table 76: Configuring a USB Modem Interface for Dial Backup

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Interfaces level in the configuration hierarchy.

  1. In the J-Web interface, select Configuration>Edit Configuration>View and Edit.
  2. Next to Interfaces, click Configure or Edit.

From the [edit] hierarchy level, enter

edit interfaces umd0

Create the new interface umd0.

  1. Next to Interface, click Add new entry.
  2. In the Interface name box, type the name of the new interface, umd0.
  3. Click OK.
 

Configure dialer options.

Dialer pool priority has a range from 1 to 255, with 1 designating lowest-priority interfaces and 255 designating the highest-priority interfaces.

  1. In the Encapsulation column, next to the new interface, click Edit.
  2. Next to Dialer options, select Yes, and then click Configure.
  3. Next to Pool, click Add new entry.
  4. In the Pool identifier box, type usb-modem-dialer-pool.
  5. In the Priority box, type 25.
  6. Click OK until you return to the Interface page.

Enter

set dialer-options pool usb-modem-dialer-pool priority 25

Configure the modem to automatically answer (autoanswer) calls after a specified number of rings.

Note: The default modem initialization string is AT S7=45 S0=0 V1 X4 &C1 E0 Q0 &Q8 %C0. The modem command S0=0 disables the modem from autoanswering calls.

  1. Next to Modem options, click Configure.
  2. In the Init command string box, type ATS0=2 \n to configure the modem to autoanswer after two rings.

Enter

set modem-options init-command-string "ATS0=2 \n"

Configure the modem to act as a dial-in WAN backup interface.

  1. On the Modem options page, in the Dialin box, select routable.
  2. Click OK.

Enter

set modem-options dialin routable


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