AT&T Bell System Plant Series Maintenance Manual page 2

SECTION SO 1-210-102
TABLE A
MOISTUREPROOF TRANSMITTER CAP PIECE PART AND COMCODE
INFORMATION FOR G3-, G4-, AND GS-TYPE HANDSETS
COLOR
SUFFIX
Black
--03
Gray -52
Lt. Gray -61
2.07
The G3AD, G3AE, G3AF, and G3AG handsets
contain the LA2 receiver mounted adapter
(Fig. 5).
2.08
The G3BR (MD) and G3DR handsets are
equipped with U4 or LB3 receiver units for use
in systems requiring receivers with higher imped-
ance (600 ohms).
2.09
The G3AH, G3AJ, and G3AK handsets (Fig. 6)
are intended for use on coin telephone sets.
The G3AHF-52 and G3AKF-52 handsets are identi-
cal to the G3AH-52 and G3AK-52 handsets, respec-
tively, except that the handle and the transmitter
and receiver caps are made of a flame retardant plas-
tic. The G3AHF and G3AKF handsets are equipped
with H4CYF (MD) or H4CYFR handset cord. These
handsets contain an LBl receiver unit and a coil (Fig.
6) which provides an external magnetic field for in-
ductive coupling to certain types of hearing aids.
These are identified by a blue grommet. Each hand-
set also contains a zinc weight mounted in the re-
ceiver end of the handset.
Note: The G3AHF-52 and G3AKF-52
handsets should only be ordered and used in
areas where the flame retardant plastic and
cord are necessary due to a vandalism problem.
The plastic is more susceptible to discoloration
and the cord is slightly stiffer than the H4CY
cord.
2.10
The G3AL-03 (Fig. 6) handset is the same as
the G3AH-03 and is intended for use on the
lOA, lOB, and 20A coinless public telephone sets.
nwo new handsets, the G3AM and G3AN are avail-
able for use with coin telephone sets. These handsets
are equipped with an H4ES high strength handset
cord assembly which has an internal steel cable. The
G3AM is similar to the G3AHF and the G3AN is sim-
Page 2
P-NUMBER COM-CODE
P-87C703 818737033
P-87C752
818737520
P-87C761 818737611
ilar to the G3AKF. Refer to Tables Band C for addi-
tional information.41
2.11
The G3-type handsets equipped with armored
cords for use with coin and coinless public
telephone sets are sealed units. Receiver and trans-
mitter caps are cemented to the handle to prevent
loss of units. If the sealed handset or cord require
replacing, handset and cord shall be replaced as a
unit.
2.12
Maintenance of G3-type handsets used in non-
coin telephone set applications consists of re-
placing cracked or broken caps, replacing defective
receiver or transmitter units, and replacing frayed or
damaged cords.
2.13
·To replace handset cord proceed as follows.
Note: For replacement of H4CJ cord, refer to
paragraph 3.04 of this section.
(1) Remove receiver and transmitter units, dis-
connect cord tips, remove acoustical barrier,
and pull defective cord outward through hole in
handle.
(2) Pass free conductors of handset end of new
cord through hole in handle.
(3) Advance cord through hole into transmitter
bowl by turning it with a threading motion
until grommet is in proper position.
Note:
Because of an occasional snug fit it
may be necessary, after advancing cord through
hole, to grasp grommet firmly with a pair of
long-nose pliers and pull into position.
( 4) Fold a piece of fairly stiff wire back onto itself
to form a long fishing tool. Insert the closed
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