in which the radio or inductive links are essentially one-way, e.g. selective calling systems [6]
7
/
08
•
•
Selective calling networks, e.g. wide area paging [6]
7
/
10
•
•
Selective call encoders, i.e. equipment at paging centre or base station [6]
7
/
12
•
•
with acknowledge back capability [6]
7
/
14
•
•
Selective call receivers [6]
7
/
16
•
•
•
Selective call decoders [6]
7
/
18
•
•
•
Functional features associated with selective call operation, e.g. battery saving circuits, address code programming [6]
7
/
20
•
in which the radio or inductive links are two-way links, e.g. mobile radio systems [6]
7
/
22
•
•
using dedicated mobile switching centres, e.g. cellular systems [6]
7
/
24
•
•
using public exchanges or networks with at least partially integrated mobile switching or mobile application [6]
7
/
26
•
•
using a private branch exchange (PBX) as final selecting device, e.g. cordless PBX [6]
7
/
28
•
•
Trunked radio systems, i.e. sharing radio channel among active subscribers [6]
7
/
30
•
•
Base station equipment [6]
7
/
32
•
•
Mobile subscriber equipment [6]
7
/
34
•
•
Test or monitoring equipment [6]
7
/
36
•
•
Arrangements for mobile service area coverage, e.g. cells layout [6]
7
/
38
•
•
Arrangements for completing call to or from mobile subscriber [6]
9
/
00
Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
9
/
02
•
Automatically-operated arrangements
9
/
04
•
Arrangements for synchronous operation
9
/
06
•
Calling by using amplitude or polarity of dc
9
/
08
•
Calling by using continuous ac
9
/
10
•
•
using single different frequencies
9
/
12
•
•
using combinations of frequencies
9
/
14
•
Calling by using pulses
9
/
16
•
•
by predetermined number of pulses
11
/
00
Selecting arrangements for multiplex systems (multiplex systems H 04 J
)
