User's Manual

26 Chapter3
Using HDLC.FRAME Protocol
Status and Error Messages
Non-E1/T1 Interface
The following transmit completion status codes may be generated by the
HDLC.FRAME protocol on a non-E1/T1 interface.
Table 3-1 Non-E1/T1 Interface Transmit Completion Status Codes
Transmit
Status Code
Description
IO_OK No error detected.
This message was successfully transmitted to the
receiving station.
IO_DSBL Terminal disabled.
Messages cannot be transmitted by a disabled terminal.
IO_LONG_MSG
(Z7340A only)
There is a limit to the number of buffers which may be
used for a single transmit frame. If this limit is exceeded,
the frame is flushed with this status code, and is not
transmitted. Note: The Z7340A card has a configurable
buffer size. A buffer size of 128 bytes or larger will
prevent this problem from occurring.
IO_SHRT_MSG
(Z7340A only)
A zero length frame cannot be transmitted by the Z7340A
ACC.
IO_TX_TMOUT Cable or local modem fault.
This message cannot be sent or acknowledged because of
a bad clock or modem signal.