Specifications

Chapter 7 – Call-Related Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 81
7.12 ATS0 Set Number of Rings before
Automatically Answering a Call
Description: This command determines the number of rings before automatic answering a call.
Read Command Syntax: ATS0?
Response(s): <n>
OK
ERROR
Write Command Syntax: ATS0=<n>
Response(s): OK
ERROR
Parameter Description:
<n>
000 Automatic answer mode is disabled. Default.
001-255 Enable automatic answering after specified number of rings.
Notes:
• This command works for MT data and fax calls.
• Autoanswering of CSD data and fax calls is supported on ASC0/Mux1 only.
• If <n> is set to higher values, the calling party may hang up before the call is automatically answered.
• The correlation between ATS7 and ATS0 is important. Example: Call setup may fail if ATS7=30 and ATS0=20.
• Setting is local to the interface. It is allowed to have different settings on different interfaces. In such cases the
interface ‘wins’, which is idle and uses the smallest <n> value.
• The ATS0 write command is PIN protected.
• The command ATS0 is also used as GPRS compatibility command to answer automatically to a network request
for PDP context activation (for details see ATS0 for GPRS). So using ATS0=<n> with n > 0, will perform a GPRS
attach, if the ME is not already GPRS attached and if ME is configured to do so (see AT^SCFG, parameter
<gs0aa>). If the GPRS attach fails (e.g., the network rejects the attach request), the write command returns an
error, though the new value takes effect.
The GPRS attach will not be performed on recalling a stored user profile with ATZ or on powerup, if a n > 0
setting was stored in the user profile with AT&W.