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Technical data
Capacity
Number of extensions 40 100
Trunk lines incl. junction
lines 12 24
Local junctors 5 10
Tone senders 3 6
Operators 1 1
Dimensioned for 0.17 erlangs with a congestion
of 0.01 and 20-40% internal traffic.
Cabinet Height Width Depth
mm mm mm
40 extensions 1068 600 300
100 extensions 1800 600 300
Telephone sets with dial for 10 or 16 Hz and
the pulse ratio 30/70-50/
50;
with push-button set for
tone frequency key sending
in accordance with CCITT
Current feeding 2\400 ohms
Loop resistance max. 1800 ohms for extension
lines, including the
telephone set, max. 1000
ohms for exchange lines
Leakage resistance min. 40 kohms
Attenuation 0.8 dB on exter- 1
nal circuits
7 dB on internal
circuits
at8Q0Hz
Crosstalk attenuation min. 80 dB at 1100 Hz
Numbering two or three-digit extension
numbers
Power feeding 110/127/220/230/240 V a.c,
50/60 Hz or 42- 54 V da,
max. power consumption
250 W
Environment +5° to +40°C ambient temperature
20-80 % relative humidity
connected to the exchange, i.e. telephone
sets and the operator's console
Thus, for example, data concerning test
connections can be programmed from a
push-button telephone and most of the
administrative data for the exchange,
such as classes of service and
abbreviated numbers, can be programmed
from the operator's console.
It is thus always possible to administer
the exchange and carry out simple fault
localization without having to introduce
extra equipment. However, it is possible
to connect an I/O device of standard
type to the exchange when large
quantities of data have to be fed in, for
example when the exchange is put into
operation or when advanced test and
fault localization programs are run. For
this purpose the exchange is equipped
with a terminal outlet with a standardized
interface in accordance with
CCITT V24. A portable typewriter terminal
is normally connected, but a display
terminal can be used instead. Remote
communication via modems is also possible.
Normally the I/O function is not permanently
connected, but is introduced in
the system when required by inserting
the necessary memory and interface
boards.
The I/O device can be used for:
— programming of system data
— initiation of test programs
— printout of the results of test programs
— printout of devices with disturbance
marking
19
— printout of busy, blocked or test
marked devices
- printout of traffic recording data.
Fault localization
Fault localization in ASB 100 can be carried
out either by means of test connections
or program-controlled tests.
Test connections are programmed from
a normal push-button telephone or from
the I/O device.
Program controlled tests are carried out
from the I/O device with the aid of special
test programs. The boards with
these can either be permanantly connected
in the exchange or plugged in
when required. They permit quick
localization of faults down to the printed
board assembly level.
The tests can be carried out without disturbing
the normal operation of the exchange.
Command language
Aspecial command language is used for
communication with ASB 100 from the
typewriter terminal. A command consists
of a command word and in certain
cases a parameter part where the
parameters are separated by colons.
The command word consists of a
mnemonic combination of five letters,
where the two first letters define the
function, the next two define the subgroup
within this function and the last
letter defines the order that is to be carried
out.