IEC801I
lna THRESHOLD TRANS=mmm DC=nnn IR=ooo TO=ppp

Explanation

During BTAM, certain errors occurred before a specified transmission count was reached on a line.

The errors are data check errors, intervention required errors, or non-text time-out errors.

In the message text:
lna
Line address, in hexadecimal.
TRANS=mmm
Number of transmissions, in decimal, before an error threshold was reached.
DC=nnn
Number of data check errors, in decimal, in the above number of transmissions.
IR=ooo
Number of intervention required errors, in decimal, in the above number of transmissions.
TO=ppp
Number of non-text time-out errors, in decimal, in the above number of transmissions.

Source

Basic telecommunications access method (BTAM)

Routing code

8,10

Descriptor code

4