E.F. Johnson Company 53SL ES Series, Руководство по эксплуатации

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53SL ES Series Mobile Radio Operating Manual April 2009 9-1
S
E C T I O N
Section 9
Data Features
Advances in digital communications allows for new data features and services operating
over the radio link. This section describes the data features and services available for the
53SL ES radio.
9.1 P25 Packet Data
P25 packet data transmission capability is available with 53SL ES 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.