
URL:https://www.toa.jp/
133-06-00031-01
Traceability Information for Europe
Manufacturer:
TOA Corporation
7-2-1,Minatojima-Nakamachi,Chuo-ku,Kobe,Hyogo,Japan
Authorized representative:
TOAElectronicsEuropeGmbH
Suederstrasse282,20537Hamburg,Germany
4.3. Type of Cable
The types of cables are to be determined according to the
following conditions.
• Twisted pair wires (such as those used for electronic push-
button telephone) are to be used for wiring between the
Exchange and the stations in principle.
• The number of cables pairs laid should be determined
considering the possibility of future expansion of the system.
• Outdoor wires should be used where wiring passes through
inaccessibleareas suchasceilingsor under oorswhere
the maintenance is not performed. Indoor wires may also be
used, however, in case where there is no risk of deterioration
due to exposure to heat, etc.
Note
Specificationsrelatedtoeachjunctionareasfollows.
Mini-clampconnector(N-8000EX/8010EXlineterminal)
Conductor diameter: ø0.4 – 0.65 mm (AWG22 – 26),
solid wire
Outside diameter: ø1.05 mm or below
Clip terminal (E-7000TB)
Conductor diameter: ø0.4 – 0.8 mm (AWG20 – 26),
solid wire
Outside diameter: ø1.5 mm or below
Terminalstation(LINE,H,Cterminals)
Conductor diameter: ø0.4 – 1.3 mm (AWG16 – 26),
solid wire, stranded wire
4.4. Relations Between Core Diameter of Cable and
Maximum Cable Length
Referring to the following chart as guidelines, design the
distance between the Exchange and stations so that loop
resistancebecomes170Ωorless.
Conductor
diameter
(mm)
Loop
resistance
(Ω/km)
Maximum cable length
between the Exchange and station.
(Assumingthattheloopresistanceis170Ω.)
ø0.4 295 570 m
ø0.5 187 900 m
ø0.65 113 1.5 km
ø0.9 58 2.9 km
4.5. Terminal Station Connection
Step 1. Stripacablejacketofapprox7mmtoexposeinner
cable.
For cables, refer to Type of Cable.
7 mm
Note
Do not solder plate on exposed inner cables when
using a stranded wire.
Step 2. Loosentheterminalscrewsandinsertthecables.
Step 3. Tighten the terminal screws securely.
Notes
• Tug lightly on the cable to be sure that it does not
pull free. If the cable pulls free, loosen the terminal
screw again and reconnect from Step 2.
• To avoid stripping the screws,
use the screwdriver appropriate
to the screws tightened into the
terminal plug.
4.6. Mini-clamp Connector Connection
Connect the mini-clamp connector supplied with the
N-8000EX/8010EXtoacableusingacommerciallyavailable
tool (pliers).
Step 1. Cut off two-cable ends in equal length, and insert
them securely to a cover section (transparent side)
of the mini-clamp connector.
Note
Insert the cable without stripping
thecablejacket.
Step 2. With a pair of pliers, lightly pinch the
mini-clamp cover and, after ensuring
that the cable is securely inserted,
rmlysqueezeonthecover.
Note
Squeeze on the mini-clamp cover until it is correctly
locked.
Step 3. Insertthewiredconnector(plug)intotheexchange’s
connector (socket) until it locks into place.
Cover
(transparent side)
Cable
N-8000EX/8010EX Rear panel
Tighten
Terminal screw
Cable
Warning
This is a class A product. In a domestic environment this
product may cause radio interference in which case the user
may be required to take adequate measures.