PIA 
RINGER 
FORM 
NO
. 
ISS 
1,  SECTION  502-304-101 
SCREWS 
P-25E803 
NUMBER  CARD 
RETAINER 
Fig. 
3-lnterior 
of 
ADl 
Telephone  Base  (Current  Production) 
HAND 
TELEPHONE 
SET  PLUG 
(T
APERED  GROMMET) 
Fig. 
4-H4DB 
Cord 
e
ACl 
base 
(for 
vertical 
mounting)-jack 
equipped to receive plug-ended handset cord. 
e
ADl 
base  (for  horizontal 
mounting)-jack 
equipped  to  receive  plug-ended  handset and 
mounting cords. 
e A lead control (optional). 
e 4-party full selective or 8-party semiselective 
ringing by  adding 426N  diode  (optional). 
e Space  provided  on  bases  for  number  card 
and associated number card retainer. 
e
The 
cover of the 
ACl 
telephone base permits 
hanging the  hand  telephone 
set 
along either 
side  of 
the 
base  by  hooking  the  receiver 
end 
on 
the 
top 
edge 
of 
the 
cover.  This 
feature 
permits 
hanging 
up 
the 
handset 
without going to 
on
-hook  position. 
Page 3 
TCI Library: www.telephonecollectors.info