E F Johnson Company 2425770 Benutzerhandbuch

Viking Portable 600 Radio Operating Manual

9-1

Section 9

Data Features

Advances in digital communication allow for new data features and services using the 
radio link. This section discusses data features and services available for Viking VP600 
radios.

P25 Trunking supports data service on a P25 Trunking system using an EFJohnson radio 
and a portable computer. The radio communicates with the computer over the P25 Mobile 
Data Peripheral (MDP) Interface, which uses an RS232 hardware interface at 9600 bits/s. 
The following protocols are supported across the interface: 

• Point To Point Protocol (PPP) 

• Internet Protocol (IP) 

• Universal Datagram Protocol (UDP)

• Transmission Control Protocol (TCP)

The radio must be programmed for data operations on the Trunked IV & D system.

The radio connects from its MDP Interface to the RS232 COM port of the computer using 
the P25 Mobile Data Peripheral (MDP) Interface cable. The radio Accessory Connector 
(side port) functions as the MDP Interface connection point.