Bell 103A Identification And Operation

BELL SYSTEM PRACTICES
Plant Series
SECTION 591-014-100
Issue 5, January 1961
AT&TCo Standard
DATA SET l03A TYPE
IDENTIFICATION AND OPERATION
1. GENERAL
1.01
This sectio;n includes identification and op-
eration of Data Set 103A type (Fig. 1 and
2). It does not include information related to
business machines used with this type data set.
1.02
This section is reissued to incl ude informa-
tion concerning the D35C-61 cord which
replaces the D25C-61 cord which is Manufacture
Discontinue (MD). Since there are data sets
using the D25C-61 cord, information concerning
this cord and its uses will be retained in this
section.
1.03
Data Set 103A type was designed to simul-
taneously transmit and receive low-speed
serial data at rates up to 300 bauds in DA TA-
PHONE* service over the voice message switched
\
8-3/4 IN. - - - - \
-r-
network, or at rates up to 150 bauds in TWX
service over teletypewriter exchange type facili-
ties.
*
Service Mark of the American Telephone and
Telegraph Company
(1) Data Set 103A1 is used -
• with customer-provided business machine
or computer-type terminals at TWX-CE
stations,
• with customer-provided business machine
or computer-type terminals at DATA-
PHONE service stations in systems pro-
viding communications with 3-row tele-
typewriter equipment.
II IN.
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Fig. 1 - Data Set 103A Type and Data Auxiliary Set 804B1
©American Telephone and Telegraph Company, 1967
Printed in U.S.A.
Page 1