Mitel SX-200 Documentation page 712

SECTION MITL9105/911 O-096-500-NA
Maintenance Panel
2.12 The plug on the right of the maintenance panel permits the
service perscnnel to pet-form maintenance tasks and enter new,
or modify existing customer data using the maintenance console. The
test line terminals
GI
the panel allow the use of a standard hand-test
set (butt-in) to establish calls through the system using preselected
circuits.
Equipment Shehres
2.13 The equipment shetves used in the SX-100 and SX-200 sys-
tems are identical, and hold up to 21 printed circuit cards which
plug into the shetf backplane. On the rear of the backplane are a
number of 25-pair plugs providing interconnections between the
shelves and externai equipment. In addition to the plugs are a number
of screw-down terminals allowing shelf connection to the primary
power supply unit The equipment shelves (Figure 2-4) measure 273
mm (10.75 in.) high, 480 mm (19 in.) wide, 415 mm (16.37 in.) deep and
weigh approximately 12.2 kg (27 lb) fully equipped.
Printed Circuit Cards
t
2.14 All circuit cards (Figure 2-5) used in the PABXs are identical in
construction and consist of a fiberglass board with printed
wiring patterns on both of its faces. Riveted to the front of each board
is a transparent faceplate which allows the LEDs mounted on the front
of the boards to be easily seen. The two color-coded card extractors,
located at the top and bottom of the faceplate, identify the card
position within a shelf and ensure that the card is seated correctly in
the backplane connector.
Primary Power Supply
2.15 The system primary power supply (Figures 2-6 and 2-7), pro-
vides all system power from a 115 Vat. In the SX-200 system,
optional factory strapping allows for 220 Vat operation. The SX-100
system has a 220 Vat adapter to allow 115 Vat power to the system.
Electrical Characteristics
2.16 The electrical characteristics of the SX-lOO/SX-200 system are
listed in Section MlTL9 105/9 110-096-l 80-NA.
2.17 Both PABXs ore designed to operate from a 48 Vdc source. A 48
Vdc power supply operating from commercial power is standard
equipment The systems may be optionally equipped with a charger
and battery arrangement which provides a minimum of 2 hours reserve
power in the event of commercial power failure.
2.18
In the event of a power failure with no reserve power available,
up to six SX-100 or 12 SX-200 Central Office (CO) trunks can
be arranged to be automatically connected to preselected extensions.
Page 7