but no green wire was available, so red and black were
used instead. These leads should be about 1.5 inches
long. Their other ends are left unconnected for now.
The two cables that go to the fax machine need to be
soldered to the fax machine row, labeled #2 in the
schematic. First, these two cables must be cut to the
proper length and brought in through the two holes in the
top of the case, one cable per hole. A very tight cable tie
(the black object in the photo) is used to form a strain
relief. This both absorbs any force on the cables and
prevents them from rotating in the holes, so the internal
connections are safe.
Standard telephone cable has four conductors: black
and yellow at the outside two positions; and red and
green at the inside two. The red and green inside
conductors are designated for use as Line 1, and virtually
all phones with a single line as well as virtually all fax
machine connections will use them. So, the black and
yellow wires (Line 2) are simply cut off; we only use the
red and green ones. The two phone cables were labeled
with a Sharpie pen at both ends, with “L” for Line or “P”
for phone to keep them straight. That completes the
wiring on the switch.
You can see the switch and the jacks are also labeled
for Phone and Line. A mistake was made in connecting
the jacks in the photo and it was not discovered until the
final assembly, so disregard the markings on the jacks in
the photo. They were correctly labeled on the outside
after assembly.
Those four short wires on the C row of the switch are
punched into the terminals on J1 and J2, labeled red and
green. These should be the two center terminals.
Instructions for this are included with these connectors.
Keep in mind that this kind of insulation displacement
connection relies on the wire being of a proper size.
Although the instructions did not specify what this size
should be, it should probably be between AWG 22 and
AWG 26. That completes all the wiring (Photo 6).
Snap the case together with care so no wires are
pinched. A quick label was generated with a CAD
program and installed with double-stick tape. As
mentioned, the jacks in the rear were marked “Line” and
“Phone” with a Sharpie marker. Finally, the two cables to
the fax machine were laced together with waxed dental
floss for a neater appearance. The switch was installed
with the double-stick foam squares that were provided,
and worked perfectly when tested.
Now, faxes can be easily sent, and there is less
chance of leaving the fax machine on the line when they
are done. NV
■ Photo 6. Completed wiring.
QUANTITY ITEM DESCRIPTION
1 Two-port surface box
Pk/5 J1, J2 RJ- 25 phone jack to fit above the surface box
1 P1, P2 Modular phone cord ( 25 foot) with modular connectors
1 S1 Miniature toggle switch, four-pole, double-throw, On-On
PARTS
LIST
Motor Control Motor Control
• 15 Amps Per Channel
• Dual Channel
• Quadrature Encoders
• DC Brushed Motors
• USB / RC / Serial
• 45 Amps Per Channel
• Dual Channel
• Quadrature Encoders
• DC Brushed Motors
• USB / RC / Serial
www.ionmc.com
• 160 Amps Per Channel
• Dual Channel
• Quadrature Encoders
• DC Brushed Motors
• USB / RC / Serial
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