Mitel SX-200 Documentation page 456

IPC Card
This card contains the system operating software in the form of
a PROM card module on the CPU card.
The CPU card also contains the microprocessor and associated
circuitry.
This card also provides RAM (Random Access Memory) for
customer data and scratch pad applications.
The customer data memory is protected from power failure by
a card-mounted battery pack
4.08 Figure 4-3 illustrates the basic interconnections of the fore-
going cards to provide the desired facilities.
Primary Power Supplies
4.09 The SX-100 and SX-200 primary power supplies generate the
system operating voltages of +8 V, -5 V, -10 V, -48 V and 90
4.10
Separately mounted on the top of the SX-100 equipment shelf
are power fail transfer relays. In the SX-200 cabinet these are
separately mounted on the left side of the equipment cabinet (as
viewed from the rear). These relays allow for the.'connection of up to
six Central Office trunks to selected SX-,100 P8X stations or 12 Central
Office trunks to selected SX-200 PBX stations, in the event of a major
system failure.
Attendant Console
4.11
The three rows of buttons on the console faceplate are used to
select and handle calls. Each button has a light-emitting diode
(LED) associated with it to indicate the status of the call appearing on
that button.
4.12 The console display area provides the attendant with specific
information concerning the call which is being handled, as well
as general information such as the time-of-day, and the busy/idle
status of PBX stations, trunks and trunk groups.
5. FEATURES
General
5.01 The PBXs offer a number of features which are provided by a
software package, known as Generic 217. A full description of
these features appears in Section MITL9105/9110-096-105-NA, Fea-
tures and Services Description. Certain limitations apply in the use of
the System Features and these are listed in Table 5-l.
SECTION 9105/9110-096-l 80-NA
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