Northern Telecom DMS-100 Series General Description, Installation And Maintenance page 49

PRACTICE 297-2011-200
Chart 3-1 Continued
STATION RINGER TEST - KEY SEQUENCES
29 Vol Down key (DW)
30 Handset off-hook
31 Handset on-hook
32 HLD key
33 HD (Hold) key
34 Vol Up key (UP)
35 Vol Down key (DW)
36 HD (Hold) key
Note: For step 36, when the HOLD key is pressed the alerting tone stops and the display (1234567890*# ) is
cleared. LCD indicators for keys A2, A3, and A4 will flash for approximately three seconds. This indicates
that a circuit test is running. No keys shall be operated during that time as this may cause test failure. When the
circuit test is completed, LCD indicators A1 to A8 will turn ON steady and, in most instances, 10/10 will be
displayed in the display window (if equipped), as given in Step 36. The numbers in the display, when read
from left to right, indicate a count of the messages received against the messages sent. The numbers depend on
the office parameter table and may vary between 10 and 50; however, the number to the left of the slash should
always be equal in magnitude to the number to the right of the slash. If the indications are as described above,
the test has passed. Should one or several add-on units be connected to the set being tested, no indications of
any kind will occur on the add-on unit or units during the circuit test. A test failure is indicated when the
following occurs:
(a) the two numbers in the display are not equal
(b) only the LCD indicators for keys A1, A2, and A8 are ON
(c) LCD indicators for keys A1, A2, and A8 wink.
Winking LCD indicators for keys A1, A2, and A8 indicate that the test did not run, perhaps due to a timeout in
the peripherals (example: high traffic volume). In that case, press the HOLD key again (Step 37) and repeat the
station ringer test.
37 HD (Hold) key
Page 3-4
Dial tone volume decreases
Dial tone switches to handset and all LCDs
flash
Dial tone switches to speaker and all LCDs
wink
Buzzer sounds for approximately one second,
and LCDs A6 to A8 are ON
Alerting tone sounds and all LCDs turn off
Alerting tone volume increases
Alerting tone volume decreases
Ringing stops and circuit test starts (see Note
below)
All LCDs are cleared (OFF) and test is
terminated
1234567890*#
1234567890*#
1234567890*#
1234567890*#
1234567890*#
1234567890*#
1234567890*#
10/10 (see Note
below)
Cleared (blank)