AT&T Bell System TWX Test Instructions

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. Copyright, 1951, by
American Tele?honc and Telegraph Company
Printed in U. S. A.
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BELL SYSTEM PRACTICES
Teletypewriter and Manual
Telegraph Station and P.B.X.
lnatallation and Maintenance
SECTION P31.210
l11ue
4, February, 1951
AT & T Co Standard
TWX SUBSCRIBER STATIONS
INSTALLATION AND MAINTENANCE TESTS
1. GENERAL
1.01 This section covers installation and maintenance tests
for TWX subscriber stations.
1.02 This section is reissued to add the break key test on-
the ringing test. This had been omitted from Issue 3.
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1.03 Tests to determine that the teletypewriter apparatus is
in the proper operating condition are specified in other
sections for the particular teletypewriter apparatus involved.
1.04 It is assumed in this section that the teletype\vriter
station installation work has been completed and that
previous tests have shown the subscriber line to be in good
condition and ready for service.
2.
INSTALLATION TESTS
2.01 After all local tests of the station apparatus have been
co1npletcd, connect the loop to the teletypewriter and
call the testboard attendant by telephone. Advise hin1 that the
station is ready for test.
2.02 The testboard attendant will direct the tests to be
made and the installer shall cooperate in carrying thern
out.
2.03 The installation tests ordinarily made are described in
the paragraphs following:
(A) Ringing Teat
2.04 The testboard will ring on the circuit. During ringing'7
period operate break key intermittently. This operation
should not interfere ,vith the ringing of the bell.
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P31.210
Page I
TWX SUBSCRIBER STATIONS
INSTALLATION AND
MAINTENANCE TESTS