Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 22)

AT Commands Features
SIM Insertion and Removal
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WM_DEV_OAT_UGD_049 - 001 VOLUME 1 August 23, 2007
2.5 SIM Insertion and Removal
SIM card insertion and removal procedures are supported. There are software
functions relying 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:
• 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 provided immediately due to background
initialization. Between the hardware SIM detect pin indicating "present" and the
final results, the AT+CPIN? sends "+CME ERROR: 515" (Please wait, init in
progress).
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.
2.6 Background Initialization
After entering the PIN 1/CHV 1, 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 occurs after PIN checking. After this response
user data is loaded in background. This means that some data may not be available
just when 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 yet, init in progress".
This type of answer may be sent by the product at several points:
• 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.