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Part 7 – Appendixes Appendix A – Response Messages and Error Codes
Universal IP AT Commands Reference Guide (Document S000457K) 104
Appendix A – Response Messages &
Error Codes
Response Messages
Standard AT Messages
Numeric
Verbose
Description
0
OK
Operation or command success
3
NO CARRIER
No physical layer connection
7
BUSY
Destination busy
8
NO ANSWER
No answer from destination
4
ERROR
Operation or command unsuccessful
2
RING
Incoming call indication
Information Messages
Numeric
Verbose
Description
1025
Ok_Info_DataBegin
Start of data
1028
Ok_Info_WaitingForData
Send data
3074
Ok_Info_SocketClosed
Socket connection closed successfully
3072
Ok_Info_NoMail
No mail to retrieve on server
3073
Ok_Info_Mail
Mail ready to be retrieved on server
3077
Ok_Info_PPP
PPP connection successful