RAS Error 720 When Dialing Out

 Last reviewed: October 17, 1997
Article ID: Q152605
The information in this article applies to:
  • Microsoft Windows NT operating system version 3.1
  • Microsoft Windows NT Advanced Server version 3.1
  • Microsoft Windows NT Workstation versions 3.5, 3.51, and 4.0
  • Microsoft Windows NT Server versions 3.5, 3.51, and 4.0

SYMPTOMS

When you try to dial out using Remote Access Service (RAS) or Dial-Up Networking (DUN), the following error message may appear: 

   Cannot connect the phonebook entry. Error 720: No PPP control protocols
   configured.
You may also receive one of the following errors when you try to add a protocol to a phonebook entry: 

   The <Protocol Name> protocol cannot be selected because it is not
   installed or is disabled for Remote Access. To change this, start the
   the Control Panel Network applet, choose Configure Remote Access, and
   press the Network button.

   The <Protocol Name> protocol cannot be selected because it is not
   installed or is disabled for Remote Access. To change, in Control Panel
   start Network, choose Services page, Remote Access Properties, and
   press the Network button.

CAUSE

This problem can occur if RAS is configured to receive calls only. To use RAS or DUN to dial out, RAS must be configured to either dial out only or dial out and receive calls.

RESOLUTION

To resolve this problem, use the appropriate method below:

Windows NT versions 3.1, 3.5, and 3.51

  1. Double-click the Control Panel icon in the Main group, and then double-click the Network icon.

  2. Under Installed Network Software, click Remote Access Service, click Configure, and then click Configure again.

  3. Under Port Usage, click either Dial Out Only or Dial Out And Receive Calls.

  4. Click OK, click Continue, click OK, and then click Restart Now to restart your computer when you are prompted.

Windows NT version 4.0

  1. Click Start, point to Settings, and then click Control Panel.

  2. Double-click Network, and then click the Services tab.

  3. Click Remote Access Service, and then click Properties.

  4. Click Configure, and then click either Dial Out Only or Dial Out And Receive Calls.

  5. Click OK, Click Continue, click Close, and then click Yes to restart your computer when you are prompted.

Additional query words: prodnt 3.10 3.50 3.51 4.00 netbeui tcp/ip ipx
Keywords : NTRAS NTSrvWkst kbnetwork kbnetwork
Version : 3.1 3.5 3.51 4.0
Platform : WINDOWS winnt

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Last reviewed: October 17, 1997
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