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SECTION 503-702-101
Fig. 3 - D-180656 Kit of Parts for Wall
Arrangements
3.05
Polarity guard (2831-type except the 2831DM;
see 3.06) should be used only when specified
by local instructions for end-to-end signaling
installations where battery and ground reversals
may be encountered.
polarity guard assembly is installed on the right
key bracket (Fig. 4) with screw provided or an
819041971 (P-90Dl97) polarity guard assembly
(adhesive backed) is installed wherever space
permits.
Connect per Table E.
3.06
The 831DM and 2831DM telephone set employs
the 2A1 matrix block in lieu of the polarity
guard described in 3.05.
polarity guard circuits. One polarity guard circuit
is required for each line which is conferenceable
by multibutton depression.
located between the station side of the line circuit
and the station cut-down field.
3.07
Where conditions warrant, G3A6, G12A, or
G15A handset can be replaced with other
types as follows:
•
For impaired hearing - G6-type
Page 4
Mounting
An 819041708 (P-90D170)
The unit provides eight
The polarity guard is
nned bv Frank Harrell. (Cowbo Frank Castle Rock, Colorado Oct OS, 2012
Fig. 4 - 2831-Type Telephone Set
(P-900170) Polarity Guard Installed
Fig. 5-lnstalling Spade-Tipped Handset Cords
•
For weak speech - G7-type
•
For noisy location - G8-type or D-180413
with
819041708
J·4:_L_= == ==�= == ==: ::l
17:06
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