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),(0),(255)
+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 <modemby- 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)
3.2.9 Diagnostic and Test Commands
#UD – Last Call Status Report
#UD is an action command requesting reporting of logged operation events. It does not take
parameters and must be the last command in the command line.
The modem logs aspects of their operation for each call, and saves these results until cleared
by one of the following events:
1.
Power off
2.
Hard reset (e.g., negate DTR with &D3 set; reset button)
3.
Soft reset = ATZ or AT&F
4.
ATD command issued
