For a private or a public network, the device type, device number and transmission type can be user defined. As a suggested implementation, the device type is a number that represents the class (or type) of the master device. Other devices of the same class should also be recognised with the same device type. Device types must be set on master devices (slaves may wildcard this value).
The device number is a unique number representing a specific master device. Typically this may be correlated to the serial number of the device, or randomly generated if serial numbers are not supported. Device numbers must be set on master devices (slaves may wildcard this value).
An easy way to understand device type and number is to consider yourself as an ANT device. Your device type might be “human”, and your device number could be represented by your name.
The transmission type is a number that represents the different transmission characteristics of a device, and must be specified on master devices (slaves may wildcard this value). This is determined by the manufacturer or pre-defined in an ANT+ network. The two least significant bits of the transmission type are used to indicate the presence, and size, of a shared address field at the beginning of the data payload, and the third least significant bit is used to indicate the presence of a Global Data Identification Byte (such as ANT+ page numbers). The most significant nibble may be used to extend the device number.