AT Commands Reference Guide
80529ST10815A Rev.2– 2017-09-14
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Information Responses and Result Codes
The TA response, in case of verbose response format enabled, for the previous examples command line could
be as shown below:
• Information response to +CMD1?:
<CR><LF>+CMD1:2,1,10<CR><LF>
• Information response to +CMD1=?
<CR><LF>+CMD1(0-2),(0,1),(0-15)<CR><LF>
• Final result code:
<CR><LF>OK<CR><LF>
Moreover, there are two other types of result codes:
Result codes that inform about progress of TA operation (e.g. connection establishment CONNECT)
Result codes that indicate occurrence of an event not directly associated with issuance of a command
from TE (e.g. ring indication RING).
Here are the basic result codes according to ITU-T V25Ter recommendation:
Result Codes
Numeric form Verbose form
0 OK
1 CONNECT
2 RING
3 NO CARRIER
4 ERROR
6 NO DIALTONE
7 BUSY
8 NO ANSWER