ZyXEL Communications ACCESSING INTERNET & INTRANET omni series - Manual (Page 117)

Diagnostics 105
beginning of data capture. The resolution of this timing information is
in 0.01 second intervals.
The following commands determine the kind of protocol data to be
captured by the EPA:
AT Command Description
ATCDn
CD0
Disable the capture of D-channel protocols.
CD1 Enable the capture of D-channel protocols
(default).
ATCBn
CB0
Disable the capture of B-channel protocols
(default).
CB1 Enable the capture of B-channel protocols.
ATCCn
CC0
Disable the capture of DTE-DCE interface
protocols(default).
CC1 Enable the capture of DTE-DCE interface
protocols.
The EPA starts to capture data when the command ATCT is issued.
This capturing process will continue until the command ATC$ is
issued. The EPA maintains 8 Kbytes RAM as a ring buffer. In case
the buffer is full, the earliest data captured will be overwritten by the
latest data.
Analyzing the Captured Data
To view the analyzed result, use the command ATC$. For your
convenience, the relevant AT commands are summarized as follows:
Command Description
ATCT Clears buffer and starts the embedded protocol
analyzer. Captures data immediately and starts the
timer.