Errors 'Cause 0, Diag 122 (DTE originated/Maintenance action)' and 'Error: address block too short (1)' establishing a connection

Document ID : KB000007800
Last Modified Date : 14/02/2018
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Connection establishment between an end-user machine and TCPaccess X.25 Server may fail persistently with:


Cause 0, Diag 122 (DTE originated/Maintenance action)

Error: address block too short (1)




X.25 network.

Q-bit (sometimes spelled Q bit) was implemented on the Cisco Router at end-user end:

X25 map rbp mmmmmmm local port nnnnn q-bit

Note: Q-bit means Qualified Data Bit.

Note: mmmmmmm and nnnnn are specific numeric values defined to the environment.

Additional Information:

X.25 Cause and Diagnostic Codes


X.25 Packet Layer Protocol (PLP)--Q-bit entry included