AT&T Bell System Plant Series Maintenance Manual page 3

(5) Place ends of receiver conductors through
loop of fish wire and feed conductors into
handle while pulling wire through to receiver
well.
(6) Connect cord leads to transmitter cup and
to receiver. Using the transmitter cup,
anchor the cord and replace the transmitter and
transmitter cap.
(7) Insert the cotton acoustical barrier and dress
the excess receiver leads into the receiver
well. Replace the receiver and receiver cap.
Note:
Acoustical barrier should not extend
into receiver well.
2.10
If a G 1-type handset is defective and must
be replaced, use a comparable G3-type as
the replacement.
G2-TYPE
2.11
The G2-type are push-to-talk or push-to-listen
handsets which are equipped with a pushbar
switch in the handle.
2.12
G2-type handsets are rated MD and have
been replaced by the G5-type.
2.13
Repair or adjustment of pushbar contacts
or springs should not be made in the field.
The G2-type handsets having defective switches
should be replaced by a comparable G5-type.
G3-TYPE
2.14
The G3-type handsets are available in standard
telephone colors. See section covering
telephone apparatus color.
2.15
Table B lists the G3-type handsets with
component parts and intended uses. Reference
to appropriate connection diagram is also given.
2.16
The G3BR, G3CR, and G3DR handsets are
equipped with U4 receiver units for use in
systems requiring receivers with higher impedance
(600 ohms).
2.17
G3FR, M, P, R, S, and T handsets are
intended for use on coin collectors. Some
coin collectors are equipped with armored handset
cords. The G3S and G3T handsets are also equipped
with a waterproof transmitter cover for use on
outdoor coin collectors (Fig. 4).
ISS 2, SECTION 501-210-102
2.18
The G3-type handsets equipped with armored
cords for use with coin collectors (G3P, R,
S, and T handsets) are sealed units. Receiver
and transmitter caps are cemented to the handle
to prevent loss of units and the receiver is equipped
with a security guard. If the sealed handset or
cord require replacing, replace handset and cord
as a unit.
2.19
Maintenance of G3-type handsets consists of
replacing cracked or broken caps, replacing
defective receiver or transmitter units, and replacing
frayed or damaged cords (except for sealed units).
2.20
To replace handset cord (except armored
cords) see 2.09.
G4-TYPE
2.21
The G4AR and G4B handsets consist of Tl
transmitter units, U3 receiver units, and
H4CJ cords mounted on a handle having two holes
for mounting a shoulder rest (Fig. 5). The shoulder
rest is a shipped loose item and can be installed
to fit either the left or right shoulder. The G4-type
handset can be used as a replacement for G3-type
handsets where a shoulder rest is desired. Connection
Fig. 7 applies for G4-type handsets.
2.22
The G4AR handset is available in black only
and is rated MD. The G4B handset replaces
G4AR and is available in standard telephone color.
The P-88C100 shoulder rest (G4B-type) is available
in color also. The last two digits of the part
number should reflect the color desired. See section
covering telephone apparatus color.
2.23
A new molded pad, P-19B931, is available
as a replacement for the two piece pad on
G4B handset shoulder rests. The new pad is
lighter in weight and of a contrasting gray color
to be used with all standard handset colors. Current
production G4B handsets will incorporate the new
pad.
2.24
Maintenance of G4-type handsets consists of
replacing cracked or broken caps, defective
receiver and transmitter units, and worn, frayed,
or damaged cords. Damaged or broken shoulder
supports and worn or discolored pads should be
replaced.
2.25
To replace handset cord of G4-type handset
see 2.09.
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