Siemens MC55 - page 154

MC55 AT Command Set
7.11 ATS0 s
m obil e
MC55_ATC_V01.05 Page 154 of 469 2/10/04
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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.