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DCP Series Telcon Message Manual - Public Support Login - Unisys

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Appendix C<br />

X.25 PSCS Cause Codes<br />

X.25 cause codes information and tables in this appendix originate from the following<br />

specifications:<br />

• Recommendation X.25, defined by the International Telecommunications<br />

Union/Telecommunications Standardization Sector (ITU/TSS), formerly the<br />

Consultative Committee for International Telegraph and Telephone (CCITT)<br />

• International Standards Organization (ISO) 8208<br />

• <strong>Public</strong> Data Networks Interfaces<br />

Cause codes are reported by:<br />

• The layer 3/4 platform interface<br />

• The packet layer services (PLS) Host interface<br />

• Directly attached X.25 DTE (DAD) devices<br />

• Packet Switched <strong>Public</strong> Data Networks (PDNs)<br />

The following generate cause codes:<br />

• The PDN to which the <strong>DCP</strong> is attached<br />

• The DCE Network Feature<br />

• A DTE that is attached to the network either directly or across the network<br />

7436 0728–303 C–1

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