Connect Systems CS1001 Manual de Instalação Página 25

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PABX (Private Automatic Branch Exchange)
A PABX is a telephone exchange in one business or building (where a dial 9 is
needed for an outside line). It connects to one or more outside telephone lines
and has two or more extentions within the business or building. See Fig 12.
Dualcom may be connected to one of the outside telephone lines where they
are the analogue PSTN type.
The extentions within the building may be analogue or digital. Where an extention
is analogue, a normal phone or fax machine may be connected. Dualcom can
be connected here and programmed to dial a 9. See Fig 13.
Where the extention is digital it is often to the ISDN standard or is a special
digital standard that is particular to the manufacturer of the PABX equipment.
Where a special digital standard is used, then a special ‘feature phone’ is
usually required, provided by the manufacturer of the PABX equipment.
Dualcom can not be directly connected to any type of digital telephone line.
Refer also to the ‘Safety Earth’ and the ‘Call Minder’ sections.
PABX with connection to Analogue PSTN Line
Fig 12
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