Itf - Transmit Flow Control Thresholds - AOpen FM56 Manual

<trans_idle>,<framed_idle>,<framed_un_ov>,<hd_auto>,<crc_type>,<nrzi_en>,<syn1>,
<syn2>
Example: +ESA: 0,0,0,,0,0,255, For the defaults.
Reporting Supported Range of Parameter Values
Command: +ESA=?
Response: +ESA: (<trans_idle> range), (<framed_idle> range),(<framed_un_ov> range),
(<hd_auto> range), (<crc_type> range), (<nrzi_en> range),(<syn1> range), (<syn2>
range)
Example: +ESA: (0),(0),(0-1), ,(0-2),(0),(255)

3.2.8.2 +ITF - Transmit Flow Control Thresholds

In V.80 Synchronous Access Mode, this optional compound parameter allows the DTE
to determine the effective input buffer size in the modem for data on transmit data from
the DTE, to control the thresholds used for flow control of such data,
and to control how often the modem reports to the DTE the number of octets in this
buffer. Note that the DTE can adjust its own thresholds for flow control of data on
received data from the modem.
Syntax
+ITF=[<off>[,<on>[,<report_period>]]]
Defined Values
<off> Determines the threshold, in octets, above which the modem will generate a flow
off signal.
Applicable in Synchronous Access Mode.
The <off> range is 20 -7000. Default <off> value is 128.
For the <on> and <off> subparameters, the input buffer is assumed to reside between
the
modem's V.24 interface and the Synchronous Access protocol layer; i.e., the buffer
count
includes all octets, including EM codes, received from the DTE, with the exception of
XON and
XOFF if these are used to signal <modem-by-DTE> flow control.
The modem returns the ERROR result code if the DTE specifies that the <off>
subparameter be
set to a value less than or equal to the <on> subparameter; in this case, the current
parameter
value settings are set to default values.
<on> Determines the threshold, in octets, below which the modem will generate a flow
on signal.
Applicable in Synchronous Access Mode.
The <on> range is 10 -5000. Default <on> value is 64.
<report_period> Not supported. A fixed value of zero is used and reported.
Reporting Current or Selected Values
Command: +ITF?
Response: +ITF: <off>,<on>,<report_period>
Example: +ITF: 128,64,0 For default values
Reporting Supported Range of Parameter Values
Command: +ITF=?
Response: +ITF: (<off> range),(<on> range),(<report_period> range)
Example: +ITF: (20-7000),(10-5000),(0)