MTCMR-G-F4 Multi-Tech Systems, MTCMR-G-F4 Datasheet - Page 122

• 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

Scan +WSCAN
Ring Indicator Mode +WRIM
Multi-Tech Systems, Inc. GPRS AT Commands Reference Guide (Document Number S000293J)
Description:
Values:
Syntax:
Description:
Values:
Syntax:
This command displays the received signal strength indication (<rssi>) for a specified frequency (in
absolute format). This command is not allowed during communication.
<absolute frequency> frequency in absolute format <rssi>
Command syntax: AT+WSCAN=<absolute frequency>
Response syntax: +WSCAN: <rssi>
This command sets or returns the state of the Ring Indicator Mode.
<mode>
<n> used only in mode RI Pulse + Pulse on Downloaded Packet (<mode>=2).
Command syntax: AT+WRIM=<n>
Command
AT+WSCAN=50
Note: Request <rssi> of absolute frequency 50
AT+WSCAN=1025
Note: Request power of absolute frequency 1025
Command
AT+WRIM=0
Note: Select up-down RI mode
AT+WRIM=1
Note: Select pulse RI mode
AT+WRIM=2,0
Note: Select mode pulse RI on downloaded packet,
pluse duration is 5 μs
AT+WRIM=?
Note: Ask the list of possible values
AT+WRIM?
Note: Ask the current value
0 Up-down RI mode
1 Pulse RI mode
2 Pulse RI mode + Pulse on Downloaded Packet
0 Duration of pulse is 5 μs
1-31 Duration of pulse is n x 30 μs
Note: Remind that this mode corresponds to the case where the remote equipment has dropped its
RTS signal to stop its flow control.
0
1
2...30 -109 to -53 dBm
31
99
•
•
•
In up-down RI mode, no pulses are sent before unsolicited AT response, and up-down signals
are sent when receiving an incoming call.
In pulse RI mode, an electrical pulse is sent on the Ring Indicator signal just before sending any
unsolicited AT response in order not to lose AT responses when client tasks are in sleep state.
Still in RI mode, when receiving incoming calls, electrical pulses are sent on the RI signal.
Pulse RI Mode + Pulse On Packet Downloaded: based on Pulse RI mode but an electrical pulse
is also sent on the Ring Indicator signal just before sending a downloaded data packet (GPRS or
CSD) if the remote client has dropped down his RTS signal.
Important: Pulse duration may be increased by up to 3 ms, due to interrupt processes
overhead.
-51dBm or greater
not known or not detectable
-113 dBm or less
-111 dBm
Possible responses
+WSCAN: 23
OK
Note: <rssi> is 23.
CME ERROR: 3
Note: 1025 is not a valid absolute frequency
Possible responses
OK
Note: up-down RI mode selected
OK
Note: pulse RI mode selected
OK
Note: mode pulse RI + Pulse on
downloaded packet selected
+WRIM: (0-2),(0-33)
OK
Note: possible values 0, 1 or 2
+WRIM: 1
OK
Note: current RI mode is pulse RI
Chapter 13 – Specific AT Commands
122