AT&T Bell System Plant Series Manual For Installation And Connections

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BELL SYSTEM PRACTICES
AT&TCo Standard
SECTION 594-028-200
Issue 3, December 1975
DAT A SET 401 M-TYPE TRANSMITTER
INST ALLA Tl ON AND CONNECTIONS
CONTENTS PAGE
1.
GENERAL
2.
OPTIONS
3. LEVEL ADJUSTMENT PROCEDURE 3
4. INSTALLATION AND CONNECTION PROCEDURE
5.
TEST REQUIREMENTS
(7
i
1.
GENERAL
5
5
1.01
This section provides installation and connection
information to be followed when installing
data set (DS) 401M-type. Information concerning
the associated business machine, data terminal
equipment, or related services is not included.
1.02
This section is reissued to illustrate the
level option switch on DS 401M-L1B.
1.03
General data set installation practices, as
outlined in the section entitled Data
Sets-General Installation and Connection Information
(590-010-200), should be followed in addition to the
procedures outlined in this section.
1.04
The data set must be installed in the same
general location as the business machine
and within reach of the customer-supplied interface
cord. This cord should not exceed 50 feet in length.
1.05
When test or demonstration calls are made,
.refer to the section entitled Crediting Charges
on Test Calls (010-250-001) for the proper procedure
for crediting charges.
1.06
Prior to installing the data set, verify that
the local loop has been tested and meets
the requirements specified in the section entitled
Data Systems-DATA-PHONE@ Service Direct
Distance Dialing Network-Test Requirements for
Subscriber, Foreign Exchange, and Remote Exchange
Lines (314-205-501).
1.07
The procedures for the removal and replacement
of the data set covers are outlined in the
section entitled Data Set 401M-Type Transmitter-
Maintenance (594-028-300).
1.08
The following test equipment, or equivalent,
will be required. for loop loss and loop
resistance measurements.
• KS-14510-Ll volt-ohm-milliammeter (VOM)
• 1013-type handset
• TTS-28 transmission test set.
2.
OPTIONS
2.01
Options for data set 401M-type vary depending
on the required application. Customer options
V, W, and X for data set 401M-L1B are made by
means of small 2-pronged plugs which fit into
lettered jacks located on the data set. Telephone
company (telco) level options are made by means
of an 8-segment switch (Fig. 1). Level options
for older sets are incorporated by means of screw
switches. Installation of options on DS 401M-type
is made in accordance with specifications on the
service order or circuit layout record card.
bt.-J,,..
Options should be installed prior to
· ~ instaJJation.
2.02
Location of option switches and option plugs
are shown in Fig. 1. Refer to Table A for
option information for data set 401M-L1B.
2.03
DS 401M-type is designed to operate on
lines supplied by a 48-volt or 72-volt battery
with a wide range of loop resistance. Series
NOTICE
Not for use or disclosure outside the
Bell System except under written agreement
Printed in U.S.A. Page 1