Conexant H08-15350, Reference Manual

Page: 58 / 120

Command Reference Manual
Conexant
1118
3-40
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),(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)