JoinTech JT600 User Manual page 31

SIM interface
Audio features
External antenna
Two serial interfaces
Phonebook management
SIM Application Toolkit
Real time clock
Timer function
Firmware upgrade
choose preferred mode.
Supported SIM card: 1.8V ,3V
Speech codec modes:
Half Rate (ETS 06.20)
Full Rate (ETS 06.10)
Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80)
Echo suppression
Connected via 50 Ohm antenna connector or antenna pad.
Serial Port 1 Seven lines on Serial Port Interface
Serial Port 1 can be used for CSD FAX, GPRS service and send
AT command of controlling module.
Serial Port 1 can use multiplexing function, but you can not use the Serial
Port 2 at the same time;
Autobauding supports baud rate from 1200 bps to 115200bps.
Serial port 2 Two lines on Serial Port Interface /TXD and /RXD
Serial Port 2 only used for transmitting AT command.
Supported phonebook types: SM, FD, LD, RC, ON, MC
Supports SAT class 3, GSM 11.14 Release 98
Implemented
Programmable via AT command
Firmware upgradeable over serial interface
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