The RNR

The DECT Radio Network Repeater (DECT RNR) is an extension of a wireless RS232 data radio connection. The DECT RNR is based on the DECT Engine MD32 Data Radio Module from Siemens AG. With a RNR the range between a FixedPart and a PortablePart can be extended on approx. 600 m /1968.50 ft  in the open area and  approx. 100 m / 328.08 ft in buildings. The transmission rate is 115,2 kBit/s.

The RNR consists of two Siemens DECT Engine MD32 Modules. One module was configurated as a PP to a RNR-PP The other one as a FP to RNR-FP. The RNR transmits the control lines  RTS/CTS and the data lines TxD and RxD.

The device has a serial interface for configuration, an internal aerial and an external power supply. The Case is made of shockproof polystyrol (light grey/dark grey).  Measurements: (H x W x D): 125 x 67 x 32 mm. A hanger  for wall assembly  is optionally available. The DECT RNR can be practised with a temperature of  0°C - 40°C.
 

Construction                                                                                                             

DECT

A DECT connection consists of a fixed part (FP) and a portable part (PP). 16 PP`s belong to 1 FP. The 16 PP`s are connected to each other as a group by a log-in procedure.Now  a data connection can be made between FP and PP. The group also stays intact during a loss of voltage. In our applications we use the DECT Engine MD3x by Siemens AG.

DECT radio module MD32        

MD 32 is the classical DECT Engine for the wireless connection via  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.With the high-quality server-mode new point-off sales’ applications were able to be created for new ideas.
 

Three operational 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).

• Configuration of the module over AT commands

• Four different configurations are storable

• The terminal device can log itself onto six basis stations

• The logging-on of up to 16 terminal devices onto one basis station is possible

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

• Automatic setting-up and dismantling of the connection is dependent on data traffic

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

• Certified according to the DECT-Standard CTR6

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

 

DECT Modem Datasheet

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