MTCMR-G-F4 Multi-Tech Systems, MTCMR-G-F4 Datasheet - Page 22

• Manufacturer Part Number: MTCMR-G-F4
• Description: MODEM GPRS QUAD BAND GSM GLOBAL
• Manufacturer: Multi-Tech Systems
• Series: MultiModem® iCellr

Specifications of MTCMR-G-F4

• Frequency: 850MHz, 900MHz, 1.8GHz, 1.9GHz
• Applications: General Purpose
• Interface: RS-232, USB
• Function: Transceiver, Modem
• Data Rate - Maximum: 115.2kbps
• Modulation Or Protocol: GSM, GPRS
• Voltage - Supply: 9 V ~ 32 V
• Package / Case: Module with Case
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Power - Output: -
• Sensitivity: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 881-1151; MTCMR-G-F4

Redial Last Telephone Number DL
Multi-Tech Systems, Inc. GPRS AT Commands Reference Guide (Document Number S000293J)
Syntax:
+VTDS
Description:
Values:
Syntax:
Description:
Values:
Syntax:
AT+VTD=<n>
The product enables the user application to send DTMF tones over the GSM network. This command
enables tones to be transmitted only when there is an active call.
<Tone> DTMF tone to transmit.
Command Syntax: AT+VTS=<Tone>
This command redials the last number used in the ATD command. The last number dialed is displayed
followed by “;” for voice calls only.
No parameters
ATDL
Command
AT+VTS=A
AT+VTS=11
Note: To set the default value
AT+VTS=4
AT+VTS=”1”;+VTS=”3”;+VTS=”#”
OK
Note: Sed tone sequence 13#
Command
ATDL
Note: Redial last number
Command
AT+VTD=6
Note: To define 600 ms tone duration
AT+VTD=0
Note: To set the default value (70 ms ± 5 ms)
AT+VTD?
Note: Query current tone duration
AT+VTD=?
Tone is in {0-9, *, #, A, B, C, D}
Possible responses
0146290800;
OK
Note: Last call was a voice call. Command valid
Possible responses
OK
Note: Command valid
+CME ERROR: 3
Note: If the <Tone> is wrong
+CME ERROR: 3
Note: If there is no communication
Possible responses
OK
Note: Command valid
OK
AT+VTD: <n>
OK
AT+VTD: <0-255>
OK
Chapter 5 – Call Control Commands
22