The Plug

The DECT Plug B1 is a cordless RS232 data radio connection for linking to the USB port of your PC. The device will be connected to the USB on your PC. The DECT Engine MD32 data radio module by Siemens AG is integrated for the radio link. The range of the DECT Plug B1 is approx. 300m in the open field and approx. 50m in buildings. The DECT Plug B1 is laid out as a full speed device with a maximum data transmission rate of 12 MBit/s (USB version 1.1). An LED light indicates the ready status of the device.The USB connection will be addressed and configured as a COM interface (virtual COM port). The maximum data transmission rate is 115,2 kBit/s.

Usually the current supply works via USB. For specific cases of application (e.g. not sufficient current consumption over the USB), a plug-in power supply can be connected ( 9 DC / 300 mA ) additionally. The DECT Plug B1 has two internal aerials. The case consists of shock-proved polystyrene (light grey/ dark grey). Measures (L x W x H): 125 x 67 x 32 mm. An optional mounting for the wall is available. The DECT Plug B1 can be operated at a temperature of  0°C - 40°C.

Installation

The USB cable normally has a maximum length of 5 m. Optionally, by using active USB cables, a distance of up to 25 m can be bypassed.

The plug functions with all operating systems which support a USB connection on a PC
(Win98, WinME, Win2000, WinXP).

Drivers for Windows 98, ME, CE, Linux, Mac, Pocket PC and Windows mobile are available on request (without support).

Application

The DECT USB Plug B1 is especially suited for mobile use with notebooks in marketing and warehouse management. Simple plugging in of the USB plug provides a radio link without additional power supply. An example is the controlling of stock of products with the PocketScan (see under Wireless Scan).
 

DECT    

A DECT connection consists of a Fixed Part (FP) and a Portable Part (PP). 16 PPs belong to one FP. The 16 PPs are connected to each other as a group by a log-in procedure. After this, a data connection can be created between FP and PP. The group also remains intact during a voltage loss. In our applications we use the DECT Engine MD3x by Siemens AG:

DECT Radio Module MD32                                                                                              

MD32 is the classical DECT Engine for wireless connection over radio of RS232 interfaces. The maximum rate of data transfer is 115,2 Kbit/s. The point-to-point configuration has in many devices substituted cable, IrDa or analogue radio standards. The ambitious server mode enabled the realisation of new 'point off sales' applications for new product ideas.

Three operating modes can be set:

            V.24 Replacement PP (Portable Part)
            V.24 Replacement FP (Fixed Part)
            V.24 Server FP (Fixed Part)

For a point-to-point data transmission one module must be configured as a terminal device (V.24 Replacement PP, portable part) and a second as a  basis station (V.24 Replacement FP, fixed part).

• module configuration over AT commands

• four different configurations storable

• terminal device can log itself onto six basis stations

• possible to log on up to 16 terminal devices onto one basis station 

• basis station configured as a V.24 Server FP can serve up to 16 RS232 connections of which 4 can be simultaneously active

• automatic set up and dismantling of the connection dependent on data traffic

• internal error correction protocol guarantees a bit error rate of < 10^-8

• certified according to DECT Standard CTR6

• secure data transmission over a reserved frequency band, data saving protocol  (LU10 Standard) as well as data encryption

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