MTCMR-G-F4 Multi-Tech Systems, MTCMR-G-F4 Datasheet - Page 31

• 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

Signal Quality +CSQ
Operator Selection +COPS
Multi-Tech Systems, Inc. GPRS AT Commands Reference Guide (Document Number S000293J)
Description:
Values:
Syntax:
Description:
Values:
Chapter 6 – Network Service
This command determines the received signal strength indication (<rssi>) and the channel bit error rate
(<ber>) with or without a SIM card inserted.
<rssi>:
<ber>:
AT+CSQ
There are three possible ways of selecting a Public Land Mobile Network (PLMN) operator:
Note:
mode, this PLMN may not be the one set by the application (as it is in the search phase).
These commands are not allowed during communication.
<mode>
<format>
<stat>
Command
AT+CSQ
0
1
2 to 30
31
99
0…7:
99
•
•
•
0
1
2
3
4
0
1
2
0
1
2
3
The read command returns the current mode and the currently selected operator. In manual
The product is in manual mode. It then tries to find the operator specified by the application
and if found, tries to register.
The product is in automatic mode. It then tries to find the home operator and if found, tries to
register. If not found, the product automatically searches for another network.
The product enters into manual/automatic mode, and then tries to find an operator as
specified by the application (as in manual mode). If this attempt fails, it enters automatic
mode. If this is successful, the operator specified by the application is selected. The mobile
equipment then enters into automatic mode.
automatic (default value)
manual
deregistration; ME will be unregistered until <mode>=0 or 1 is selected.
set only <format> (for read command AT+COPS?)
manual / automatic (<oper> shall be present), if manual selection fails, automatic mode is
entered.
long alphanumeric format <oper>
short alphanumeric format <oper>
numeric <oper> (default value)
Status of operator
unknown
available
current
forbidden
<format>: format of <oper> field
Possible responses
+CSQ: <rssi>,<ber>
OK
(Note: <rssi> and <ber> as defined below)
-113 dBm or less
-111 dBm
-109 to –53 dBm
-51dBm or greater
not known or not detectable
as RXQUAL values in the table GSM 05.08
not known or not detectable
Commands
Chapter 6 – Network Service Commands
31