R&S^®PostMan II Information and Communication System

R&S®PostMan II is a combined hardware/software product with client-server architecture for advanced Internet/intranet communications via radio. It offers e-mail, fax, file transfer, voice and data services by radio from almost any point on earth. The internationally standardized TCP/IP protocol ensures interoperability with systems from other manufacturers, allowing R&S®PostMan II to be used in computer networks with different platforms and operating systems. There are no special hardware or software requirements for the workstation terminals (the “clients”).

R&S®PostMan II allows information to be exchanged between individual workstation terminals as well as throughout entire computer networks via a LAN. An R&S®PostMan II server with an optional interface expansion can simultaneously exchange information across several links and in both directions (receive and transmit). For example, an e-mail can be transmitted over one link while a fax is being sent over another.

The primary transmission media are HF/VHF/UHF radio, satellite radio and the GSM network. The transmission protocol that is used was specially developed by Rohde & Schwarz. It is particularly well suited for secure data transmissions via half-duplex radio links. In radio transmissions, R&S®PostMan II controls the connected transceiver or modem via a serial interface. This feature is implemented as standard for the Rohde & Schwarz Transceiver R&S®XK2000.

Once the R&S®PostMan II software has been modified as necessary, virtually any data-capable transceiver can be implemented.

The following applications are possible:

• E-mail (with attachment)
• Fax service
• Voice mail
• File transfer (FTP)
• Chat
• Transparent TCP/IP
• Radio telephony
• GPS tracking
• Broadcast telegram mode
• Cyclic exchange of data in secured networks