MTCMR-H4-P1 Multi-Tech Systems, MTCMR-H4-P1 Datasheet - Page 53

• Manufacturer Part Number: MTCMR-H4-P1
• Description: MODEM CELLULAR QUAD GPRS HSPA
• Manufacturer: Multi-Tech Systems
• Series: MultiModem® iCellr

Specifications of MTCMR-H4-P1

• Function: Transceiver, HSPA, Modem
• Modulation Or Protocol: GPRS, GSM, EDGE
• Frequency: 850MHz, 900MHz, 1.8GHz, 1.9GHz
• Applications: General Purpose
• Interface: RS-232, USB
• Data Rate - Maximum: 7.2 Mbps
• Voltage - Supply: 9 V ~ 32 V, USB
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 881-1120

+IPR Set Fixed DTE Rate
High Speed HSPA-H4 AT Commands Reference Guide (Document S000483A)
Description:
Values:
Parameter Storage:
Examples:
Syntax:
This command specifies the data rate at which the data circuit equipment (DCE) will accept
commands.
Notes:
Caution:
<rate>
Command
Action Command:
AT+IPR=<rate>
Read Command:
AT+IPR?
Test Command:
AT+IPR=?
Command
AT+IPR?
AT+IPR=?
AT+IPR=38400
AT+IPR=0
•
•
•
The serial autobauding feature is supported for the following serial speeds only:
1200, 2400, 4800, 9600, 19200, 38400, 57600 115200, 230400, 460800, 921600 bps.
Beyond those serial speeds, proper operation of the modem is not guaranteed.
Any AT command issued by the DTE must start with both capital ‘A’ and ‘T’ (or ‘/’) or
The DTE waits for 1ms after receiving the last character of the AT response (which is
both lower case ‘a’ and ‘t’ (or ‘/’); otherwise, the DCE may return some garbage
characters and become desynchronized. Should this happen, the DTE simply issues
‘AT\r’ (at 2400 or 4800 bauds) once or twice or just ‘AT’ (at 9600 bauds) to
resynchronize the modem.
always ‘\n’ or 0x0A) to send a new AT command at either the same rate or a new rate.
Should this delay be ignored, the DCE can become desynchronized. Once again,
sending ’AT\r’ once or twice or just ‘AT’ causes the DCE to recover.
When starting up, if autobauding is enabled and no AT command has yet been
Baud Rates That Can Be Used by the Data Circuit Equipment (DCE).
300
600
1200
2400
4800
9600
19200
38400
57600
115200
230400
460800
921600
The <rate> parameter is stored in EEPROM using AT&W. The default value can
received, the product sends all unsolicited responses (like RING) at 9600 bauds.
0
be restored using AT&F.
Enables autobauding. Default
Responses
+IPR: 9600
OK
+IPR:
1200,2400,4800,9600,19200,38400,57600,115200,230400,460800,
921600) , (0,300,600,1200,2400,4800,9600,19200,38400,57600,115200,
230400,460800,921600)
OK
Note: Possible values, according to V25 ter Recommendation:
The first set of values indicates the range of auto-detectable baud rates.
The second set of values indicates the baud rates supported by the DCE.
OK
OK
Responses
OK
+IPR: <rate>
OK
+IPR: (list of auto-detectable <rate>s), (list of supported <rate>s)
OK
Note: Enable autobauding
Note: Disable autobauding and set rate to 38400 bps
Note: Current rate is 9600 bps
Chapter 3 – Supported GSM/WCDMA AT Commands
53