are designed for use on any GSM network in the world. TANGO55/i and TANGO56/i are Tri Band GSM/GPRS engines that work on three frequencies GSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz or 850 MHz, DCS 1800 MHz, PCS 1900 MHz, respectively. These full type approved integrated modems constitute a self contained, fully integrated implementation of the GSM/GPRS. TANGO55/i and TANGO56/i feature GPRS class B, class 10 (making download at speeds up to 85 kbps) and support the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4. TANGO55/i and TANGO56/i modems incorporate all you need to create high-performance GSM/GPRS solutions; baseband processor, power supply ASIC, complete radio frequency circuit including a power amplifier, internal and external SIM interfaces and an antenna interface as well. The TANGO55/56 are mobile stations for transmission of voice, data calls and FAX as well as short messages (SMS - Short Message Service) in GSM network. To control the GSM module there is an advanced set of AT commands according to GSM ETSI (European Telecommunications Standards Institute) 07.07 and 07.05 implemented.

TANGO55/56 i-option

The TANGO55i/56i modems provide a specific software and hardware (internal TCP/IP stack software with hardware extension) which has been internally implemented for using the embedded TCP/IP stack software. The integration of TCP/IP stack with hardware extension (a TCP/IP module added) into the equipment converts it to a stand-alone client that can be connected to the internet via GPRS network. The modems can also send and receive data by GSM (set into Command-Mode) and GPRS network using TCP/IP stack. They support SMS, DATA and FAX calls.