E F Johnson Company 2425M70 Benutzerhandbuch

9-1

Section9

Data Features

Advances in digital communications allows for new data features and services using the 
radio link. This section describes the data features and services available for the Viking 
VM600 radio.

P25 packet data transmission capability is available with Viking VM600 mobile radios. A 
Data option switch can be programmed to toggle the data mode ON and OFF (or the menu 
option can be used).

The P25 Packet Data mode allows a subscriber unit to act as a packet data modem for a 
remote application connected to the subscriber unit through an RS-232 or Serial Line 
Internet Protocol (SLIP) connection. The SLIP connection requires an Ethernet port.

Three P25-compliant conventional data operating modes are supported:

• Direct Radio to Radio mode - In this mode the radio will transmit data directly to 

another subscriber without any involvement of fixed network equipment.

• Repeater mode - In this mode, the radio will transmit data on the inbound channel of a 

repeater. The repeater will retransmit the data on the outbound to another subscriber 
radio listening on the outbound channel.

• FNE data mode – In this mode, the mobile subscriber transmits data to a fixed network 

computer connected to the FNE.