US Robotics 56K USB Modem User Manual page 54

Table 100. +IPR Commands
+IPR=115200 115200 bits/s.
Table 101. +IPR Extended Syntax Commands
Command
+IPR=<DTE rate>
+IPR?
+IPR=?
+ITF=<off>,<on>—Transmit Flow-Control Threshold
Use this command to set the flow-control thresholds. The <off> parameter represents the off signal
threshold in octets. When this threshold is reached, the DCE generates a flow-off signal. The <on>
parameter represents the on signal threshold in octets. When the volume of data resident on the DCE goes
below this value, the DCE generates a flow on signal.
ITU-T Recommendation V.80 defines an additional parameter (<report period>) for the +ITF command.
This parameter is only used in synchronous mode and is not supported in the controller-based set.
Result codes:
• OK if <off> = 0—3 and <on> = 0—2.
ERROR if <off> ≠ 0—3 or <on> ≠ 0—2.
•
Table 102. +ITF Extended Syntax Commands
Command
+ITF=<off>,<on>
+ITF?
+ITF=?
+MR=<value>—Modulation Reporting Control
Use this command to hide or display the modulation report. When the modulation report is enabled, the
DCE transmits the +MRR: <rate>, <rx_rate>, and the +MCR:<carrier> intermediate result codes to the
DTE. The <carrier> reported is the current modulation, e.g., V.34. The <rate> reported is the transmit rate
in bits per second or is zero if negotiation fails. The <rx_rate> is the receive channel rate and is only
reported when different receive and transmit rates have negotiated.
The intermediate result codes are transmitted after the modulation and the rate have been determined and
before any error control or data compression reports or the final result code (e.g., CONNECT) is
transmitted.
Result codes:
• OK if <value> = 0, 1.
ERROR if <value> ≠ 0, 1.
•
Table 103. +MR Commands
Command
+MR=0 Turns off the modulation report.
+MR=1 Turns on the modulation report.
Sets the DTE to DCE transmission rate.
Displays the current DTE to DCE transmission rate.
Displays all supported transmission rates.
Sets the flow control thresholds.
Displays the current value of the flow control thresholds.
Displays the supported values of the flow control thresholds.
Function
Description
Description
Command Reference - 48
56K USB Modem
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