Specifications

TC35 / TC37 Hardware Interface Description
TC35_37_HD_02_V03.10 - Released Page 17 of 92 21.12.2001
Feature Implementation
Serial interface RS232 (2.65V CMOS level) bi-directional bus for commands / data using AT
commands
TC35/TC37 modules support Multiplex mode according to the GSM 07.10
Multiplexer Protocol and enable one physical serial interface to be
partitioned into three virtual channels. This allows you to take advantage of
up to 3 simultaneous sessions on the serial interface. For example, you can
transfer data over one channel while two further channels are free to control
the GSM engine with AT commands.
Supported SIM card 3V
Phonebook
management
Supported phonebook types: SM, FD, LD, MC, RC, ON, ME
Selectable baud rate 300bps ... 115kbps (AT interface)
Autobauding range Supported baud rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600,
115200
Firmware download Optionally via RS232 interface or SIM interface
Real time clock Implemented
Timer function Programmable via AT command
Physical characteristics Size: 54.5 x 36 x 6.75mm
Weight: approx. 18g