General; Circuit Card Description - Mitel SX-5 Manual

SECTION MITL9103-098-100-NA
TABLE 5
-1
SX -5 ELECTRICAL CHARACTERISTICS
TABLE
5- TONE
PLAN
Parameter
Station Loop Limit
Minimum Leak Resistance
Maximum Number of Ringers per Line
Ringing Voltage
Ring Trip
Crosstalk
Tone Plan
Insertion Loss: Station-to-Station
Insertion Loss: Station-to-Trunk
Longitudinal Balance
Return Loss
Idle Circuit Noise
Impulse Noise
System Impedance
Primary Power
Central Office Loop Limit
Environmental Requirements
Detail
600 ohms including set at 20 mA;
360 ohms including set at 25 mA
15,000 ohms
3
90 Vrms, at 17.5, 20, or 25 Hz
During silent or ringing period
Better than 75 dB down
As defined in Table 5-2
5 dB+/- 0.5 dB at 1000 Hz
0.6 dB+/- 0.4 dB at 1000 Hz
60 dB minimum, 200-3.400 Hz (on trunks)
16 d B single frequency, 24 dB echo
16 dBrnC maximum
0 counts above 55 dBmC for 95% of cases
-
600 ohms nominal for extensions
900 ohms nominal for trunks (600 ohms
optional)
1 10- 120 Vac. 47-63 Hz, 0.6 A maximum,
0.3 A typical (220 V operation optional)
1600 ohms maximum
0
-
40°C (32- 104OFI
10%
-
90% Relative Humidity noncondensing
7. SYSTEM CONFIGURATION
TONE
Dial Tone
Busy Tone
Ringback
Tone
Reorder
Tone
Camp-On
Tone
Transfer
Dial Tone
General
TONE PLAN 1
3501440 Hz
Continuous
4801620 Hz
500 ms On,
500 ms Off
Repeated continuously
4401480 Hz
1 sec On,
3
sec Off
Repeated continuously
4801620 Hz
250 ms On,
250 ms Off
Repeated continuously
440 Hz
Single burst of
200 ms
3501440 Hz
100 ms On,
7.01 The SX-5 equipment cabinet consists of a
single enclosure containing the entire
system electronics, and power supply. The
system contains four circuit cards Main Card,
Power Supply Card, Trunk Module, and the
Memory Module. Main and Power Supply cards
are connected to the chassis, with the Trunk and
Memory Modules plugging into the Main Card
Keyed connector patterns prevent Trunk and
Memory Modules from being plugged into the
wrong position
100 ms Off
Repeated three times,
then continuously
Circuit Card Description
7.02 All circuit cards used in the system are
constructed of a fiberglass boaid with
printed circuit patterns on both of its faces. Re-
fer to Fig 7-1, SX-5 Equipment Layout The
functions of the cards are as follows
(a) MAIN CARD: contains all the switching
circuitry including the six extension inter-
faces. This card also includes:
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