Bell System 407 Series Supplementary Information

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BELL
SYSTEM PRACTICES
AT&TCo Standard
SECTION 594-800-150
Issue 2, October 1975
407-TYPE MULTIPLE DATA STATION
SUPPLEMENTARY INFORMATION
CONTENTS
1. GENERAL
2. PHYSICAL INFORMATION
A. 407-Type Multiple Data Station
PAGE
2
4
4
B. Power and Grounding Requirements 4
C. Customer Interface Connector and Cable
. Requirements
3. OPTION INFORMATION
A. Data Sets 407 A and 407B
B. Station Options
C. Option Descriptions
4. INTERFACE AND DATA SIGNAL
CHARACTERISTICS • • • •
A. Interface Signal Characteristics
B. Data Signal Characteristics
6
6
6
6
6
6
6
11
5. SYSTEM CAPABILITIES AND OPERATION 12
A. System Operation With a Key Telephone
Set • 12
B. System Operation With a 2B or 3A
Automatic Call Distributor 15
C. Private Line Capability
6. THEORY OF OPERATION
DATA SET 407A
A. Line Control Circuit
15
16
16
16
NOTICE
CONTENTS PAGE
B. Tone and Voice Answer-Back Circuits
C. Hybrid and Voice Receive Circuits
D. Customer Interface Circuits
E. Automatic Call Distributor Interface
19
20
20
Circuits • • 21
F. Status Lamp Indication Circuits
G. AGC Amplifier
H. Group Separation Filters
I. Group Limiters and Divide-by-Three
21
22
22
Circuits • • • • • • • 22
J. Clocks and Synchronization Circuits
K. Time-Domain Detectors
22
25
L. Logic, Timing, and Inhibit Circuits 25
M. Output Drivers and Lockup Circuits 26
DAT A SET 407B
A. Special Code Detectors
B. Computer Down Circuits
41-TYPE DATA MOUNTING
A. Test Unit of 41A1 Data Mounting
B. 101A Power Unit
7.
MAINTENANCE AND TEST INFORMATION
26
26
26
31
31
32
35
Not for .use or disclosure outside the
Bell System except under written agreement
Printed in U.S.A.
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