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5. Place the rear of the housing against the mounting surface. Using the four mounting holes
located in each corner of the enclosure as a template, scribe mounting hole locations on the
mounting surface.
To avoid damage when drilling, ensure that both sides of the mounting surface are clear of any
parts or wires. Drill the holes only through the desired surface.
6. Drill four holes at the scribed mounting hole locations. Remove all burs and sharp edges.
Secure the housing to the surface with user-supplied hardware.
7. Attach the conduit to the enclosure. Feed the wiring through the conduit and bring it into the
enclosure.
8. Re-install and secure the motherboard to the bottom of the enclosure with the four screws
removed in Step #4. Wire the unit as described in Section E.
9. After completing the wiring, reinstall the speaker amplifier and power supply modules into
the receptacles mounted on the motherboard and secure with the screws removed in Step 4.
Plug-in the handset amplifier connector cable at CN1 and secure with the two screws. Re-
install the enclosure cover and secure with the four screws removed in Step 3.
C. Panel Mount SelectFone Station Installation
The panel or flush mount intercom station consists of a panel mount handset unit and a remotely
mounted subset unit. The subset unit consists of a handset amplifier, speaker amplifier, and power
supply in an enclosure.
The panel mount handset assembly incorporates a black, impact resistant, Cycolac®handset with
noise canceling dynamic microphone, black cradle with proximity sensor hook switch, and a
channel selector switch. It has a push-to-page switch located in the handset handle, an "off hook"
indicator LED, and a 10 ft cable with 25-pin D subminiature connector. To install the panel mount
unit follow the steps described below:
1. Install the subset enclosure within 10 ft of the panel or flush-mount unit as described in
Section A and make electrical connections as described in the Section E.
2. Locate the handset assembly approximately 54" from the floor in an area where the wires
and cable are free from interference. Ensure that the back of the panel is closed.
3. Using the template (see Figure 3) provided with the panel-mount handset assembly, make a
rectangular cutout in the panel. Drill four holes in the panel to mount the handset assembly.
4. Pass the 25-pin D-subminiature connector through the cutout in the panel and anchor the
handset assembly to the panel with user-supplied hardware.
5. Plug the 25-pin D-subminiature connector at the end of the cable to the 25-pin receptacle of
the remotely mounted subset unit and fasten it with the two screws provided on the connec-
tor.
D. Desktop Station Installation
The SelectFone desktop station is similar in construction to the panel mount station. This station
consists of a desk top handset assembly and a remote subset unit. The subset unit consists of the
motherboard, the power supply module, the speaker amplifier, and the handset pre-amplifier board
housed in an enclosure. The remote subset cover has a 25-pin D-subminiature receptacle to re-
ceive the connector from the desktop assembly.
The desktop unit incorporates an impact resistant, Cycolac® handset with noise-canceling dy-
namic microphone and a channel selector switch. It has a push-to-page switch located in the
CAUTION
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