Mitel Panther II 820 System Manual page 228

Electronic key telephone system
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Panther II 820/1032/2064-200
The maximum cable lengths are:
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KSU to MDF - should not exceed 25 feet.
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KSU to stations should not exceed the following:
- 2000 feet using 24 AWG cable
Power
Supply
Requirements
5.05
The power for the Panther II systems must be supplied from a 110 Vat, 15
Amp, mains commercial
power supply.
It is recommended
that the supply be:
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wired and fused independently
from all other power receptacles.
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controlled directly from the circuit breaker and not from a local switch.
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located within 4 feet of the KSU.
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easily accessible for removal of the plug, if required.
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equipped with a surge protector to reduce the likelihood of damage to the
equipment in the event of a lightning strike (Recommended
Supplier:
ITW LINK, Elk Grove Village, Illinois - # LP3-230-220
for C.O.
Lines; # LP3-90-30 for each station pair).
Grounding
5.0 6
The KSU must be connected
to a 'high quality' ground through a separate
single, solid conductor
(12-gauge), terminated
on the Ground Terminal on the top panel
of the KSU.
requirements:
The ground connection
for the KSU should comply with the following
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The current, as measured between the Ring side of a C.O. Line and the ground
source, should equal at least twice the short circuit loop current, measured between the
Tip and Ring of that C.O. line. See Figure 5-2.
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The 12 AWG ground cable should not exceed 18 inches in length.
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The ground cable should be a continuous
solid conductor having a total resistance of
less than 0.5 ohms when measured between its point of origin (i.e., the ground source}
and the Ground Terminal on the KSU.
Note:
Failure to properly ground the KSU may cause system failure.
-1
Installation and Commissioning
Page 9

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