Bell System Practices TOUCH-A-MATIC 2872A1M Identification, Installation, Connections, Operation, And Maintenance page 10

SECTION 503-603-101
(4) Manually dial CO dial test and ringer circuit (9) 0Go off-hook and manually dial a known
and simultaneously record into memory telephone number with a WAIT input inserted
location immediately above LAST NUMBER in the telephone number.
DIALED button [paragraph 5.01 (4) through (7)].
After depressing RECORD OFF button, and (10) Momentarily hang up the handset and then
when dial test circuit is ready, test dial frequencies automatically dial the number by depressing
by manually dialing digits 1 through 0 into the the LAST NUMBER DIALED button. The set
test circuit, should stop dialing when it reaches the stored
WAIT input. Depress the LAST NUMBER
(5) Momentarily hang up handset and automatically DIALED button again and the remaining digits
dial the test circuit number recorded in Step should be dialed._
(4) by depressing button immediately above
LAST NUMBER DIALED button and proceed OPTIONAL APPARATUS INSTALLATION
as follows.
A. D-180492 Kit of Parts (With Speakerphone)
(a) Depress LAST NUMBER DIALED button.
Digits 1 through 0 will be automatically 3.08 To install.
dialed into test circuit. Verify that correct
signal is returned from test circuit. (1) Proceed as described in paragraph 3.16.
(b) Momentarily depress the memory buttons (2) Make connections per the appropriate Tables,
used in Step (3) in the same sequence in B through E.
which the digits were recorded. Verify that
correct signal is returned from test circuit (3) Mount the kit assembly to the chassis with
after each series of numbers, the screws provided (Fig. 4). Beveled corner
of printed wiring board (PWB) should be located
The battery and the power unit must at lower right corner.
be connected a minimum of five
minutes before doing Step (c).
B. D-180493 Kit of Parts (Dial Tone Detector and
One-Touch Calling Switch)
(c) Momentarily disconnect the power unit
(for 5 to 10 seconds). After reconnecting 3.09 To install.
power unit, depress a memory button of a
memory location used in Step (3), to verify (1) Remove the housings (paragraph 3.21), and
retention of memory, access PSB terminal board (paragraph 3.17).
(6) Dial the appropriate code for ring-back to (2) Insert the board assembly from the back of
test the ringer, the set and locate as shown in Fig. 4, such
that the two tabs on the board assembly fit into
(7) Check operation of the logic reset switch the slots in the bottom of the chassis.
by pressing the RECORD button (RECORD
lamp will come on) and subsequently pressing (3) Lock the board into position by inserting
an unoperated line button. The RECORD lamp the self-threading screw through the right
must go out. side of the chassis.
(4) Mount the one-touch calling switch below
(8) If equipped with one-touch calling option the dial with the two screws provided.
(D-180493 Kit of Parts and speakerphone),
and with set in on-hook condition, depress the Note: If switch for D-180818 Kit of Parts
memory button used in Step (4). The speakerphone is already present, the one-touch calling switch
should turn on, dial tone should be detected, can not be installed. The PSB terminal where
and the stored number should be automatically the switch leads should be connected (Table
dialed. C or E) shall be strapped together. (The
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