ACC Error Guide
ZX25D System Messages
CLASS: Normal 400-499
Chapter 12254
Action: In most cases, this message can be ignored. However, if
this message is frequently logged or abnormal behavior
is observed, you should contact your HP support
personnel.
zx25d 436 Link <#>: VC disabled status received for term <#>, but no
ZLU is associated with it. Probable F/W failure.
Explanation: The X.25 Protocol driver received a VC disabled
unsolicited status message, however, there was no
associated VC ZLU for the indicated MUX terminal
number. This most likely means there is a defect in the
MUX firmware.
Action: In most cases, this message can be ignored. However, if
this message is frequently logged or abnormal behavior
is observed, you should contact your HP support
personnel.
zx25d 437 Link <#>: No ZLU associated with Term #<#> on write
completion! Probable driver defect.
Explanation: The X.25 Protocol driver received a Control Write
completion status message, however, there was no
associated VC ZLU for the indicated MUX terminal
number. This most likely means there is a defect in the
ZCOM or X.25 driver software.
Action: If this message is frequently logged or abnormal
behavior is observed, you should contact your HP
support personnel.
zx25d 438 Link <#>: Control write (type = <#>) failed with error <#>!
Explanation: The primary mechanism used by the X.25 Protocol
driver to manage VC Call Request, Clears, and Resets
is through special Control Write requests issued to the
X.25 firmware. A control write request is performed
using the zcntl() routine. The completion status
returned by the X.25 firmware for one of these requests
has indicated an unexpected failure. This may be a
normal condition, for example, in the case where the
link is disconnected right as a call is being placed. The










