Northern Telecom DMS-100 Series Installation And Maintenance Manual page 55

0
0
0 V.54 Interface Enable/Disable:
0 This option
0 When this switch (ganged) is in the Disable position, V.54
0 ing is disabled and the data unit operates normally.
0 switch is set to the Enable position, the test
0 to the DTE and the loopback signal inputs from the DTE are ena-
0 ble, allowing testing to be
0 This option is preset to Disable.
0 Modem Pool/Normal:
0 This switch
0 modem pool.
0 NT4X25AD, a
0 for modem pooling.
0 added. When
0 the modem pool data unit accepts the CTS signal
0 and sends it back to the far-end data unit.
0 MI Pulse/MI Level:
0 This option
0 the MI and MIC state.
0 tor) Pulse, the MI and MIC leads are either shorted or open for a
0 2.5 second pulse when a call occurs.
0 MI Level, the MI and MIC leads are either shorted or open for the
0 duration of a call.
0 switch to the MI Level position.
0 for switch settings.
0 MI Invert/Normal:
0 This option switch (number 3 on SW4) determines the state of the
0 MI and MIC leads.
0 and MIC leads are shorted for the duration determined by the MI
0 Pulse/MI Level setting.
0 and MIC leads are open for the
0 Pulse/MI Level setting.
0 this switch to the Normal position.
0 for switch settings.
0
provides normal operation or V.54 external testing.
performed
(NT4X25AD /CH /DF)
configures the
When this switch
250 millisecond CTS (clear to send) delay is added
When it is set to Normal,
this switch is set to Modem Pool on the NT4X25CH,
(NT4X25AD /CH /DF)
switch (number 2 on SW4) determines the duration of
When the switch is set to MI (mode indica-
When the DU is not in a modem pool, set the
(NT4X25AD /CH /DF)
When the switch is set to MI
When the switch is set to Normal, the MI
When the DU is not in a modem pool, set
(NT4X25AV /CH)
from a
DU for normal use or for use in a
is set to Modem
no
When the switch is
See Figure 3.11 on
duration determined
See Figure 3.11 on page 3-36
297-2121-226
VINTAGE 05.01
test-
When this
indicator output
V.54 interface.
Pool on the
CTS delay is
from the modem
set to
page 3-36
Invert, the MI
by the MI
3-35