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GENERAL
The Linesman's telephone is a portable instrument, suitable for connexion to all
types of exchange
ine and designed for use by maintenance and field engineers.
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A three-position slider switch enables the internal battery to be switched in and out
of circuit and in the non-locking position of this switch, connects ringing current
from the transistorised generator to the
headset (Pye TMC Headset S 508640) Cat.No. A437 can be plugged jn and used
as an alternativel:o the handset and two sockets enable the output from a tone
amplifier to be connected to this receiver.
A polyurethane-impregnated nylon carrying case (Pye TMC Cat. No. A424) may
also be used to give additional protection in use in very rugged conditions.
INSTALLATION
1.
Batteries. Three dry cells U2, R20 or equivalent (fully sealed types only)
should be used . Unscrew the cap on the side of the instrument and insert
the batteries ensuring they are correctly in series, outer end positive (+ve).
Make periodic checks to make sure that cells are in good condition and not
leaking.
Linesman's Telephone - Deck Layout
ine terminals. A jack is provided so that a
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Tone Amplifier Sockets
2.
Connection to Line: When the telephone is connected to a pair in a cable
that contains working circuits, disturbance to that circuit can be limited as
follows:-
a)
Set the three-position slider switch in the C.B. position and connect
telephone to line.
b)
704 telephone. Isolate the transmitter before removing handset from
its cradle by pressing the button on the handset.
1705 telephone. It is not necessary to press the handset button to
isolate the transmitter as this model has a press to speak action.
c)
Check that the line is not in use.
OPERATION
1.
Central Battery and Automatic Working
a)
Check as in paragraph above that the line is not in use.
b)
If line is not in use, release or press transmitter button as appropriate.
c)
Dial the required number or make request to operator if on CB
exchange line.
d)
When headset is used, replace the handset in its cradle after the
number has been dialled. To clear the line, remove the headset
plug from socket.
Three Position Slide Switch
Headset Jack
Gravity
Switch
r,
Battery
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LJ
Xmitter
Switch
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