Microsoft KB Archive/246677

= Setting TN3270 Mode Only on SNA Server Causes Applet to Fail =

Article ID: 246677

Article Last Modified on 6/29/2004

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APPLIES TO


 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 3.0 Service Pack 2
 * Microsoft SNA Server 3.0 Service Pack 3
 * Microsoft SNA Server 3.0 Service Pack 4
 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 4.0 Service Pack 1
 * Microsoft SNA Server 4.0 Service Pack 2
 * Microsoft SNA Server 4.0 Service Pack 3

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This article was previously published under Q246677



SYMPTOMS
The 3270 applet that ships with SNA Server only supports TN3270E protocol. By default, the SNA Server TN3270 Service supports both TN3270 and TN3270E client connections. However, if you select the TN3270 Mode only check box for the SNA Server TN3270 service, the applet does not work. Selecting TN3270 Mode only limits the TN3270E service to TN3270 mode and the applet cannot connect. The client session has a blank screen and no errors are generated. A "connecting" message appears on the status line. TN3270E emulators provided by other vendors encounter the same problem.



CAUSE
The TN3270 Mode only option was added to SNA Server because some TN3270 emulators are unable to negotiate properly with the TN3270 service. For more information, please refer to the SNA Server online Help.

The TN3270E protocol is specified by RFC 1647.

Keywords: KB246677

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