Funkwerk FT4, Руководство по эксплуатации, Страница: 17 / 151

Safety information 15
Information on use
The overall system must meet the device and test requirements of the preliminary
standard DIN V VDE V 0825 part 1 if the personal emergency signal system is used
for hazardous work carried out alone. In this context, please refer to the requirements
and safety rules issued by the employer's liability insurance association according to
BGR 139 (formerly ZH 1/217).
Radio network/Reachability
In any radio network, there is no guarantee of permanent reachability due to system
properties.

Check the proper login of your radio set into the TETRA infrastructure at regular
intervals.

TETRA emergency cally are a TETRA feature and have top priority within the
radio network. When a large number of connections is active, other connections
may be terminated in order to transmit a TETRA emergency call.

TETRA units without a personal emergency signal function offer the feature of a
TETRA emergency call to a ISSI or a GISSI.

TETRA units with a personal emergency signal function which do currently not
operate in Secury mode offer the feature of a TETRA emergency call to a ISSI or a
GISSI. At that time, the alarm types of the personal emergency signal function
cannot be used.

TETRA units with a personal emergency signal function which currently operate in
Secury mode offer all TETRA personal emergency call alarm types. In Secury
mode, a TETRA emergency call cannot be transmitted.

Use of the TETRA emergency call requires that the radio set used is either no per-
sonal emergency signal unit or is not logged in as a personal emergency signal
unit (FT4 S) with a personal emergency signal centre. In these cases, no TETRA
emergency call can be transmitted when no radio connection is available due to
insufficient radio coverage. Transmit the TETRA emergency call one more time as
soon as the radio connection is re-established.