Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 217 12/24/2010
310 SIM not inserted
311 SIM pin necessary
312 PH SIM pin necessary
313 SIM failure
314 SIM busy
315 SIM wrong
316 SIM PUK required
317 SIM PIN2 required
318 SIM PUK2 required
320 Memory failure
321 Invalid memory index
322 Memory full
323 Invalid parameter
324 Invalid input format
330 SMSC address unknown
331 No network
332 Network timeout
340 No CNMA ack
500 Unknown
512 SIM not ready
513 Unread records on SIM
514 CB error unknown
515 PS busy
517 SM not ready
528 Invalid (non-hex) chars inPDU
529 Incorrect PDU length
530 Invalid MTI
531 Invalid (non-hex) chars in address
532 Invalid address (no digits read)
533 Incorrect PDU length (UDL)
534 Incorrect SCA length
536 Invalid First Octet (should be 2 or 34)
537 Invalid Command type
538 SRR bit not set
539 SRR bit set
540 Invalid User Data Header IE
753 CRSM missing parameter
754 CRSM invalid command