Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 28 23.06.2010
2.2.16 ATS0 Set Number of Rings before Automatically Answering the Call
ATS0 Set Number of Rings before Automatically Answering the Call
Read Command
ATS0?
Response
<n>
OK
Response
This parameter setting determines the number of rings before auto-answer.
OK
ERROR
Write Command
ATS0=<n>
Parameter
<n> 0 Automatic answering is disable
1-255 Number of rings the modem will wait for before
answering the phone if a ring is detected
Reference
V.25ter
Note
If <n> is set too high, the calling party may hang up before the call can be
answered automatically.
2.2.17 ATS3 Set Command Line Termination Character
ATS3 Set Command Line Termination Character
Read Command
ATS3?
Response
<n>
OK
Response
This parameter setting determines the character recognized by TA to
terminate an incoming Command line. The TA also returns this character in
output.
OK
ERROR
Write Command
ATS3=<n>
Parameter
<n> 13 Command line termination character
Reference
V.25ter
Note
Default 13 = CR. It only supports default value.
2.2.18 ATS4 Set Response Formatting Character
ATS4 Set Response Formatting Character
Read Command
ATS4?
Response
<n>