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Solved: “Error 734: The PPP Link Control Protocol Was Terminated” on TEMS Investigation

While you are trying to have a call on a mobile phone connected to TEMS Investigation, you may face an error like this:

An error concerning RAS occured, State AuthNotify. 734.0: The PPP link control protocol was terminated

The PPP link control protocol was terminated.

Indeed, this isn’t a specific problem for TEMS, see below.

Solution 1

This is a common problem for Point-to-Point Protocol (PPP) dial-up connection. So, Microsoft has a help page for that. It says:

  1. Click Start, point to Settings, and then click Network and Dial-up Connections.
    NOTE: For Windows Server 2003, click Start, point to Control Panel, and then point to Network Connections.
  2. Right-click the appropriate dial-up networking connection, and then click Properties.
  3. Click the Networking tab, and then click Settings.
  4. Click to clear the Negotiate multi-link for single link connections check box (if it is selected).
  5. Click OK, and then click OK.
  6. Double-click the connection, and then click Dial.
    • If this procedure resolves the issue and you can establish a dial-up connection, you do not have to follow the remaining steps in this article.
    • If this does not resolve the issue and you cannot establish a dial-up connection, go to step 7 to continue to troubleshoot this issue.
  7. Right-click the connection, and then click Properties.
  8. Click the Security tab.
  9. Under Security options, click Allow unsecured password in the Validate my identity as follows box, and then click OK.
  10. Double-click the connection, and then click Dial to verify that you can establish a dial-up connection.

Solution 2

If the first resolution doesn’t work, try this one. There is useful information about this problem in TEMS Investigation help file:

Possible causes:

  • PDP Context Activation failure. See the Activate PDP Context Reject message in the Layer 3 Messages window for the cause value.
  • The phone lacks an APN for the network. Try setting the APN by sending the following command to the phone: AT+CGDCONT=1, “IP”,”” (replace the final string by the correct URL).

In order to get information how to send AT command, check my previous post out. Also you’ll need the APN address. For AT&T users, check this page out.

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