AT&T Bell System 401E Series Description And Operation page 7

(
(
(
l
(
155 6, SECTION 594-014-100
T
DATA
1
I I
' I
I
TALK
i
OSCILLATOR A OSCILLATOR B OSCILLATOR C
(QI)
(Q2) ( Q-5)
TO
co
LINE
ANSWER-BACK
A0-600
HZ ( REST)
B0-1098HZ (REST) C0-1950HZ (REST)
OR
TELEPHONE POLARITY
HOLDING AMPLIFIER
Al-697HZ Bl-l209HZ Cl-2050HZ
PBX
CIRCUIT
GUARD
CIRCUIT
(04,05)
A2-770HZ B2-1336HZ
C2-2150HZ
LINE
A3-852HZ B3-1477HZ C3-2250HZ
T~LK
1
A4-941HZ B4-l633HZ C4-2350HZ
R
I I
l l
I
DATA
T
TEST
l~YS
- -
*
PRESENT AT THE INTERFACE CONNECTOR
BUT NOT USED BY CUSTOMER'S EQUIPMENT.
:.::
u
<t
ID
:.::
u
<t
ID
594-014-200
594-014-300
594-014-500
I I
a: a:
w
w
31: 31:
en
fl)
z z
<t <t
w
w
...J
...J
(!)" (!)
ID
ID
z z
0
0
>= >=
::::> ::::>
w
IJ.J
<
<t <t
:.:: :.::
' '
19 20 24 25
3
C\I
I<")
<:t
<t <t <t
' ' '
4
5 6
z
0
:::lE
:::lE
0
u
---+--+---+---+----ilTESTl--+--+--
4~
- C\I
I<")
<:t
ID ID ID ID
7 9 10 II 12
*
- C\I
I<")
<:t
u u u u
' ' ' '
14 15 16 17
TYPICAL CUSTOMER EQUIPMENT
Fig. 5-Data Set 401El, 401E2, or 401E4-Block Diagram
Data Set 401E-Type Trans-
mitter~ Installation and Con-
nections
Data Set 401E-Type Trans-
mitter-Maintenance
Data Set 401E-Type Trans-
mitter-Test Procedures
594-014-150 Data Set 401E-Type Trans-
mitter-Theory of Operation
and Supplementary Information
CD- & SD-1D063-01 Data Systems Station Data Set
401E-Type-Transmitter Circui~
Page 7
7 Pages