MTCMR-G-F4 Multi-Tech Systems, MTCMR-G-F4 Datasheet - Page 11

• 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

SIM Card Insertion and Removal Procedures
Background Initialization
About the Length of Phone Numbers
Multi-Tech Systems, Inc. GPRS AT Commands Reference Guide (Document Number S000293J)
Chapter 3 – General Behaviors
SIM card Insertion and Removal procedures are supported. Software functions rely on positive reading of the hardware
SIM detect pin. This pin state (open/closed) is permanently monitored.
When the SIM detect pin indicates that a card is present in the SIM connector, the product tries to set up a logical SIM
session. The logical SIM session will be set up or not depending on whether the detected card is a SIM Card or not. The
AT+CPIN? command delivers the following responses:
When the SIM-detect pin indicates card absence, and if a SIM Card was previously inserted, an IMSI detach procedure is
performed, all user data is removed from the product (Phonebooks, SMS etc.). The product then switches to emergency
mode.
When the hardware SIM detect pin is not managed, the software cannot know the state of the SIM (SIM inserted or SIM
removed) except for the initialization of the modem. In this case, the SIM must be present in the rack before the
initialization of the modem can be taken into account.
If the SIM is removed and it had been detected at the time of initialization of the modem, the following message is
displayed: +CME ERROR: 13. If the SIM is inserted in the rack and it was not present at the time of the initialization of the
modem, the state of the SIM remains unchanged (SIM removed). It will have to initialize the modem again so that it is
detected.
After entering the PIN (Personal Identification Number), some SIM user data files are loaded into the product
(Phonebooks, SMS status, etc.). Please be aware that it might take some time to read a large phonebook.
The AT+CPIN? command response comes just after the PIN is checked. After this response user data is loaded (in
background). This means that some data may not be available just after PIN entry is confirmed by ’OK’. The reading of
phonebooks will then be refused by “+CME ERROR: 515” or “+CMS ERROR: 515” meaning, “Please wait, service is not
available, init in progress”.
This type of answer may be sent by the product at several points:
Phone numbers can consist of up to 60 digits. The first 20 digits are stored in the SIM in the phonebook file (EF
or EF
EF
Example:
If there are no more free records in the EF
EXT2
•
•
•
•
•
•
•
Number of Digits
LND
).
) corresponding to the selected phonebook. The next digits are stored in other extension SIM files (EF
If the SIM detect pin indicates “absent”, the response to AT+CPIN? is “+CME ERROR 10” (SIM not inserted).
If the SIM detect pin indicates “present”, and the inserted Card is a SIM Card, the response to AT+CPIN? is
“+CPIN: xxx” depending on SIM PIN state.
If the SIM detect pin indicates “present”, and the inserted Card is not a SIM Card, the response to AT+CPIN? is
CME ERROR 10.
These last two states are not given immediately due to background initialization. Between the hardware SIM
detect pin indicating “present” and the previous results the AT+CPIN? sends “+CME ERROR: 515” (Please wait,
init in progress).
When trying to execute another AT command before the previous one is completed (before response),
When switching from ADN to FDN (or FDN to ADN) and trying to read the relevant phonebook immediately,
When asking for +CPIN? status immediately after SIM insertion and before the product has determined if the
inserted card is a valid SIM Card.
•
•
21 to 40
41 to 60
1 to 20
if the user tries to store an entry that exceeds 20 digits: +CME: 20
if the user tries to dial an number that exceeds 20 digits: +CME: 20
Nb of Records in EF
1
1
1
EXT1
, the behavior is:
ADN
Nb of Records in EF
0
1
2
EXT1
Chapter 3 – General Behaviors
EXT1
ADN
, EF
or
FDN
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