Installation
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If a headset with a carbon or electret mic element is to be used with the Tone Remote it
should be plugged into the 4-conductor handset jack. A headset interface box is available
from Zetron for connecting a 4- or 6-wire headset with a two pronged jack to the handset
jack. If a footswitch is to be used with the headset, the footswitch can be wired to the
“PTT” input of “TB3” with “JP6” in Position A (no desk mic allowed in this
configuration). When using a headset, the handset must be off hook in order for transmit
audio to be routed from the headset mic instead of the front panel microphone. The audio
levels have been optimized for a handset and will need adjustment if a headset is used.
Supervisor Takeover Connection
If several remotes are connected in parallel to a single base station, the remote closest to
the base station should be designated as the supervisor remote. A key on this remote can
be programmed to toggle the Supervisor Takeover output. When active, the terminal
labeled “SUP” of “TB3” will be pulled to ground. This output should be connected to
drive a relay or other device which disconnects the other remotes from the system.
Line Connections
These steps cover connecting the Digital Tone Remote to the wire run from the
termination panel.
With the bottom cover removed, route the TX pair (TX/RX pair for 2-wire) through the
entrance hole of the bottom cover and connect them to the screws labeled “2W-1” and
“2W+1” of terminal block TB1. Set the termination jumpers (JP1 and JP4) on the deskset
to the high-impedance setting (Position B).
For the Model 284, use “2W-2” and “2W+2” of terminal strip “TB2” for the Line 2 TX,
“2W-3” and “2W+3” for Line 3 TX, and “2W-4” and “2W+4” for Line 4 TX. Set JP2, JP3,
JP7, JP8, JP9, and JP10 to Position B.
This step is for 4-wire installations only, skip ahead to step 3 if yours is a 2-wire
installation. Route the RX pair through the entrance hole and connect them to the screws
labeled “4W-1” and “4W+1” of the terminal block TB1.
For the Model 284, use “4W-2” and “4W+2” of terminal strip TB2 for the Line 2 RX,
“4W-3” and “4W+3” for Line 3, and “4W-4” and “4W+4” for Line 4.
Repeat step 1 (and 2 if applicable) for each deskset in the system.
Note
With headsets offered by Zetron (P/N 950-0030 and 950-0032):
Change R54 to a 20 k
(1/8 watt 5%) resistor
Change R62 to a 2 k
(1/4 watt 5%) resistor
With other headsets, pots may be inserted in place of these
resistors to achieve the proper audio levels.