> 1. | Introduction

> 1.1 | Scope of the document

> This document presents the AT Command Set for the Siemens Cellular Engines
> TC65 Module, Release 03.000
> TC65 Terminal, Release 03.000.
> Before using the Cellular Engine or upgrading to a new firmware version please read the latest product information provided in the Release Notes [1].
> More information is available at the Siemens Website: http://www.siemens.com/wm.
> If features differ between the TC65 Module and the TC65 Terminal this is noted in the section that refers to the AT command. At present the following features are concerned:

> Table 1.1: | Product specific use of AT commands

> AT command | TC65 Module | TC65 Terminal
> All AT commands | Statements on ASC1, USB, charging and CHARGE-ONLY mode apply. | Statements on ASC1, USB, charging and CHARGE-ONLY mode are not applicable to TC65 Terminal.
> AT^SAIC | TC65 Module has three audio interfaces. All parameters are usable as described. | TC65 Terminal has one analog audio interface. See settings specific to TC65 Terminal.
> AT^SNFM | Command mutes the microphone. In addition, the power supply of the microphone path of the second analog audio interface can be controlled. | TC65 Terminal has no programmable microphone power supply. Command is only intended for muting the microphone.
> AT^SSYNC | SYNC pin may be assigned different functions: <mode> 0, 1 or 2. Delivery default is <mode>=0. | SYNC pin is only intended to drive the LED of the TC65 Terminal and supports only <mode>=1 or 2. Delivery default is <mode>=2.
> AT^SBC | All functions fully applicable | Command not applicable.
> AT^SAADC | Not relevant for TC65 Module. | Required to calculate precise measurement values delivered by AT^SRADC.
> AT^SWDAC | Applicable to DAC_OUT pin as described. | Command not applicable. Pin not available.