Siemens MC55 manual Mobile

MC55 AT Command Set

7.11 ATS0

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•The correlation between ATS7 and ATS0 is important.

Example: ATS7=30 and ATS0=20 may not allow call establishment.

•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.

•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 per- form a GPRS attach, if the ME is not already GPRS attached and if ME is configured to do this (see AT^SCFG, parameter <gaa>). If the GPRS attach fails (e.g. the network rejects the attach request), the write command returns with error, but the value of <n> is changed anyway.

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.

MC55_ATC_V01.05	Page 154 of 469	2/10/04
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