Microsoft KB Archive/169667

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Article ID: 169667

Article Last Modified on 10/28/2006


  • Microsoft Exchange Server 4.0 Standard Edition
  • Microsoft Exchange Server 5.0 Standard Edition

This article was previously published under Q169667


The Microsoft Exchange Server documentation states that the Eicon cards are the only X.25 cards supported by Microsoft Exchange Server. This is not true; in some cases X.25 cards manufactured by Cirel are also supported.


The statement that only Eicon cards are supported refers only to the installation of the X.25 protocol stack within the Microsoft Exchange Server Administrator program. Currently only Eicon cards can be used for an X.400 connector using a native X.25 connection.

It is possible to configure an X.400 Connector or a Site Connector using a Cirel X.25 card. You must install the Cirel X.25 board and the PassLan/IP product so that you can route the IP protocol over the X.25 physical link. On the Microsoft Exchange Server computer , you can either install a Site Connector or add a TCP/IP stack and configure an X.400 Connector. This solution produces more protocol overhead and is not suited to very slow X.25 connections (less than 9600 bps).


Cirel is an X.25 board manufacturer whose FPX cards (models B, S, B AS, and S AS) are supported by Microsoft Exchange Server on Windows NT Server versions 3.51 and 4.0.
To contact Cirel:

6-8 rue de la Grande Lande
33174 Gradignan Cedex France
Tel: (011) 33 5 56 75 54 75

The third-party contact information included in this article is provided to help you find the technical support you need. This contact information is subject to change without notice. Microsoft in no way guarantees the accuracy of this third-party contact information.

For additional information, please see the following article in the Microsoft Knowledge Base:

169668 TITLE: XCON: X.25 Support for SAT Cards

Keywords: kb3rdparty kbusage KB169667