Vodavi Starplus DHS, Technical Manual

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2-48 DHS Installation
Figure 2-26: External Paging Equipment Installation
Conditions
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If the one-way paging equipment requires DTMF signaling from the key telephone,
then an unused CO Line should be dedicated for proper page interface.
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For Talk-back Paging or Multi-zone External Paging, the manufacturer recommends
using a vacant CO line port for best operation.
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A 600 ohm interface is provided on every CO line; therefore, any available CO line may
be used for paging.
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Since all CO line dialing is subject to toll restriction, a CO line port will not connect the
station's audio until at least one DTMF digit is dialed.
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It may be necessary to assign the CO line being used for paging as a PBX type trunk
with one-digit or two-digit access. Therefore, normally toll restricted extensions may
still make external pages, without being restricted.
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