Siemens MC55 - Manual (Page 460)

MC55 AT Command Set
19.5 Factory Default Settings Restorable with AT&F
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MC55_ATC_V01.05 Page 460 of 469 2/10/04
Confidential / Released
Miscellaneous Commands
ATS3 <n>
=013
ATS4 <n>
=010
ATS5 <n>
=008
AT Command Factory Defaults