Toshiba Strata VI Installation Instructions Manual page 6

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• Reinstall the back cover, and se-
cure it with the five screws that
were removed earlier.
04.22
Secure the MKSU,
as
shown
in Figures 2 and 3, with fasteners
through the upper two holes and the
single lower hole in the backplate.
The fasteners should be either 1/4-inch
molly screws, toggle bolts·, or lag
screws, depending upon the type of
wall surface being used.
WALL
CABLE
FIGURE 3
04.23 Prior to installing any printed
circuit boards, install the power supply
per instructions in Section 100-006-250,
MPSA-200 Installation or Section
100-006-255, EPSA-104 Installation.
05 MTOU PCB OPTIONS
05.01 The MTOU houses several
options that must be considered before
it is installed in the MKSU, they are:
• Background Music Relay Service--
the optional BR relay (Kl socket,
Figure 4), if installed, provides a
dry contact at the BR terminals on
the front of the MTOU to control
cut-off of BGM during an external
page. The relay operates whenever
an external page occurs.
- 3 -
SECTION 100-006-200
INSTALLATION INSTRUCTIONS
DECEMBER 1982
• Night Relay Service-the optional
NR relay (K 2 socket), if installed,
provides a dry contact at the NR
terminals on the front of the
MTOU. The W3 strap option (Fig-
ure 4) allows the relay to function
in one of two modes.
a)
b)
FIGURE 4
Answering Machine Control-
if the W 3 strap is not cut,
the relay is operated contin-
uously when the system is in
night service. This mode is
in tended for indirect control
of an answering machine.
Night Bell Control-if the W3
strap is cut, the relay pulses
at a 1-sec. on, 3-sec. off
rate whenever the system is
in night transfer mode and an
incoming call is ringing the
system. This mode is in-
tended to be used for indirect
control of an external night
bell.
• External Page Impedance Selec-
tion-the external page output
appears at the terminals labeled
8/600 on the front of the MTOU.
The output impedance can be se-
lected to be either 8 ohms or 600
ohms. If 8 ohms is selected, the
output will be via a 3-watt