XCON: Exchange Fails to Allow an Incoming X.25 Connection

 Last reviewed: April 15, 1997
Article ID: Q157698
The information in this article applies to:
  • Microsoft Exchange Server, versions 4.0, SP1, and SP2

SYMPTOMS

The Microsoft Exchange Message Transfer Agent (MTA) might fail to receive an inbound X.25 connection due to an incorrect X.121 address. This can occur even though the X.121 addresses match on both sides of the connection.

CAUSE

The MTA improperly overwrites the inbound X.121 Address field with the incoming Facilities Data field. This causes the X.121 addresses not to match when a session attempt is made. Thus, the X.25 listen will fail if Facilities Data is configured inbound.

MORE INFORMATION

If the Facilities Call Data field does not have to be used, the field can be left blank and the inbound X.121 address will be unaffected.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 4.0. This problem was corrected in the latest Microsoft Exchange Service Pack. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces): 

   S E R V P A C K

Additional query words: sp3 x25 eicon mci att
Keywords : kbbug4.00 kbfix4.00.sp3 kbusage XCON
Version : 4.0
Platform : WINDOWS

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Last reviewed: April 15, 1997
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