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1-Wire is a device communications bus system designed by Dallas Semiconductor (now Maxim) that provides low-speed data, signaling and power over a single signal, albeit using two wires, one for ground, one for power and data. 1-Wire products provide combinations of memory, mixed signal, and secure authentication functions via a patented single contact serial interface. With both power and communication delivered over the serial protocol, 1-Wire devices are unmatched in their ability to provide key functions to systems where interconnect must be minimized. 
 

M2M (Wikipedia) - refers to data communications between machines. M2M is most commonly translated as Machine-to-Machine but has sometimes been translated as Man-to-Machine, Machine-to-Man, Machine-to-Mobile and Mobile-to-Machine. Like all evolving technologies, its definition continues to evolve, but it generally refers to telemetry or telematics that is accomplished using networks, especially public wireless networks.


M2M-Alliance - is a german initiative open to M2M technology providers and users. The objective is to increase awareness of the opportunities created by wide ranging M2M technology and associated solutions for both business and commerce. 


MDEX 
- a service provider for wireless and internet M2M communication. Mdex offers fixed IP adresses for GPRS networks.

MODBUS - is a serial communication protocol published by Modicon in 1979 for use with its programmable logic controllers (PLCs). This application-layer messaging protocol is positioned at level 7 of the OSI model. It provides client/server communication between devices connected on different types of buses or networks. Most Modbus devices communicate over a serial RS-485 (EIA-485)physical layer.

ORBCOMM
 - is a global satellite data communications company focused exclusively on M2M communications. ORBCOMM provides affordable, reliable, two-way data communications services around the world through a global network of 29 low-earth orbit (LEO) satellites and accompanying ground infrastructure.

RS-485 / EIA-485 is a serial communication method for computers and devices. EIA-485 only specifies electrical characteristics of the driver and the receiver. It does not specify or recommend any data protocol. EIA-485 enables the configuration of inexpensive local networks and multidrop communications links. It offers high data transmission speeds (35 Mbit/s up to 10 m and 100 kbit/s at 1200 m). 

FOTA  is an acronym for "Firmware Over-the-Air". It is used for upgrades to mobile devices. Often a firmware upgrade can be only done by a serial communication method. Sending a new firmware or new application software thru the mobile network (GSM/GPRS/UMTS) make the maintenance and support of M2M devices comfortable. For large scale M2M networks this feature is a must