Bell System Practices TOUCH-A-MATIC 2872A1M Identification, Installation, Connections, Operation, And Maintenance page 21

ISS 5, SECTION 503-603-101
(1) Go off-hook, before another number can be dialed from
memory. (The RECORD lamp will not light
(2) Listen for dial tone. at any time but depressing the RECORD
OFF button will remove the set from the "last
(3) Dial access digit(s), number dialed" mode and allow additional
automatic dialing.)
(4) Depress WAIT button, after second dial
tone is heard. (b) Dial Intermix (D-180818 Kit of
Parts): With the switch in the ON
(5) Manually dial telephone number, position, manually and automatically dialed
digits may be intermixed as desired. Operation
(6) To redial same number automatically, of the RECORD OFF button is not required.
(a) For factory-wired sets, go off-hook, Note: In this mode, the RECORD button
listen for dial tone and depress LAST and the LAST NUMBER DIALED feature are
NUMBER DIALED button. Automatic inoperative.
dialing will stop at the recorded WAIT
input. When second dial tone is heard, 6. MAINTENANCE
depress LAST NUMBER DIALED button
again to complete automatic dialing. 6.01 In case of power failure, the automatic dialing
feature cannot be used. The battery retains
(b) For sets equipped with the dial tone the number associated with each of the memory
detector only, go off-hook, listen for buttons for at least 24 hours. If power loss exceeds
dial tone, and depress LAST NUMBER 24 hours, the numbers may have to be rerecorded.
DIALED button.
(c) For sets equipped with the one-touch
A. Trouble Analysis
calling option (with speakerphone and
dial tone detector), simply depress the 6.02 When trouble is encountered, the subsequent
LAST NUMBER DIALED button, procedure should be followed.
F. End-to-End Signaling (1) Confirm improper operation either as a basic
telephone set or as an automatic dialer
5.07 For end-to-end signaling (such as data (Part 5).
transmission) this set has the capability to
intermix manual and automatic dialing. This can (2) Check for improper connections.
be accomplished if the following procedures are
observed. (3) Refer to Table N, and the following paragraphs.
Note: If the telephone set is to be used (4) If removal of set is required, proceed as
for end-to-end signaling, V option (with polarity follows.
guard) shall be used, (Fig. 9B).
(a) $Disconnect power unit from ac outlet
(1) If the telephone set is equipped with the and unplug battery.0
one-touch calling option the initial number
must be dialed automatically (even if the one-touch (b) Disconnect telephone set.
calling switch is in the OFF position). This
allows the dial tone detector to complete its (c) Place battery plug sideways into housing
function and then additional numbers may be slot below battery jack and tape into
dialed automatically or manually, place.
(a) Standard Operation: If, at any time, Warning: Failure to restrain plug
information is keyed in manually, the can result in plug damage necessitating
RECORD OFF button must be depressed battery replacement.
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