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Chapter 2 – AT Commands
Command:
Values:
Default:
Description:
Command:
Values:
Default:
Description:
Command:
Values:
Default:
Description:
Command:
Values:
Default:
Description:
Command:
Values:
Default:
Description:
Command:
Values:
Default:
Description:
&P n Make/Break Dial Ratio
n = 0, 1, 2,3
Varies by country/region
&P0 Make/Break dial ratio of 39/61 at 10 pps
&P1 Make/Break dial ratio of 33/67 at 10 pps
&P2 Make/Break dial ratio of 39/61 at 20 pps
&P3 Make/Break dial ratio of 33/67 at 20 pps
&Q n Sync/Async Mode
n =0-3, 5, 6
5
This command is an extension of &M and is used to control which connection modes are
permitted. It is used in conjunction with S36 and S48 . (See also the \N command.)
&Q0 Selects direct asynchronous operation. See &M0 .
&Q1 Selects synchronous connect mode with asynchronous offline command mode.
See &M1 . Serial interface operation only.
&Q2 Selects synchronous connect mode with asynchronous offline command mode;
enables DTR dialing of directory 0. See &M2 . Serial interface only.
&Q3 Selects synchronous connect mode with asynchronous offline command mode;
enables DTR to act as a talk/data switch. See &M3 . Serial only.
&Q5 The modem will try to negotiate an error-corrected link. It can be configured using
S36 to determine whether a failure will result in disconnecting or falling back to a
non-error-correction connection. See also \N3 .
&Q6 Selects asynchronous operation with speed buffering and no error correction.
Same as \N0 .
&R n Clear to Send (CTS) Control
n = 0 or 1
1
&R0 Lets the CTS state follow the RTS state when online..
&R1 Forces CTS high (ON).
Note: This command applies only in synchronous mode.
&S n Data Set Ready (DSR) Control
n = 0 or 1
0
&S0 Forces DSR high (on) at all times.
&S1 Lets DSR go high only during a connection.
&T n Local Analog Loopback Test
n = 0,1
None
The modem will perform the local analog loopback test if &T1 is selected. The test can be
run only when the modem is in asynchronous operation in non-error-correction mode
(normal), AT&Q6 . To terminate a test in progress, the escape sequence ( +++ ) must be
entered first.
&T0 Terminates any test in progress. Clears S16 .
&T1 Starts local analog loopback, V.54 Loop 3. Sets S16 bit 0. If a connection exists
when this command is issued, the modem hangs up. A CONNECT XXXX message
is displayed at the start of the test.
&V n Display Current Configuration and Statistics for Last Connection
0,1
None
&V0 Displays the current (active) configuration.&V1 Displays statistics for the last
connection. Not available in all versions. Note: See also the L5 command. (L5 is not
supported in MT5656ZDX).
Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273F)
10
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相关代理商/技术参数
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MT5656ZDX-V-CP 制造商:Multi-Tech Systems 功能描述:V.92 VOICE/DATA/FAX MODEM (25 MODEMS) - Bulk
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