Siemens AC75 manual ATS0?, ATS0=n

AC75 AT Command Set

7.12 ATS0

s

7.12 ATS0 Set number of rings before automatically answering a call

Syntax

Read Command

ATS0?

Response(s)

<n>

OK ERROR

Write Command

ATS0=<n>

Response(s)

OK

ERROR

Reference(s)

V.250

PIN ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge 4 Last

± + + + + + + - - -

Parameter Description

<n>(num)(&W)(&V)

000(&F)	Automatic answer mode is disabled.
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.

•According to "3GPP TS 27.007 (GSM 07.07): AT command set for User Equipment (UE)", ATS0 is also used as GPRS compatibility command to answer automatically to a network request for PDP context activation (see Section 11.21). Therefore, when the ATS0 write command is issued with <n> greater than 0, the ME will attempt to perform a GPRS attach if not yet attached and if configured to do so (due to the setting AT^SCFG="GPRS/ATS0/withAttach","on").

If the automatic GPRS attach fails the ME keeps trying to attach for approx. 5 minutes, before ATS0 ends up with "ERROR" or "+CME ERROR: unknown", though the new <n> value takes effect. To avoid the risk of long response times to ATS0 in such case take care that the parameter AT^SCFG=<gs0aa> is off, if autoanswer mode is not needed for GPRS or if the mobile works in non-GPRS networks.

The GPRS attach will not be performed on recalling a stored user profile with ATZ or on powerup, even though a value <n> greater than 0 was stored in the user profile with AT&W.

AC75_ATC_V01.002	Page 170 of 569	10/30/06
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