Microsoft KB Archive/152605

Knowledge Base

RAS Error 720 When Dialing Out

Article ID: 152605

Article Last Modified on 11/1/2006

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APPLIES TO

• Microsoft Windows NT Advanced Server 3.1
• Microsoft Windows NT Workstation 3.1
• Microsoft Windows NT Advanced Server 3.1
• Microsoft Windows NT Workstation 3.5
• Microsoft Windows NT Workstation 3.51
• Microsoft Windows NT Workstation 4.0 Developer Edition
• Microsoft Windows NT Server 3.5
• Microsoft Windows NT Server 3.51
• Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q152605

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 Control Panel Network applet, choose Configure Remote Access, and press the Network button.

   -or-
                

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, click Control Panel, and then double-click Network.
2. On the Services tab, click Remote Access Service, and then click Properties.
3. Click Configure, and then click either Dial Out Only or Dial Out And Receive Calls.
4. Click OK, click Continue, click Close, and then click Yes to restart your computer when you are prompted.

MORE INFORMATION

For more information on RAS Error 720, please see the following articles in the Microsoft Knowledge base:

123298 RAS Errors 611 and 720 With PPP or SLIP

122748 Err Msg: Error 720: No PPP Control Protocols Configured

Additional query words: prodnt 3.10 netbeui tcp/ip ipx

Keywords: kbnetwork KB152605

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