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PSTN Line Connection (Dualcom alone on line)

Your Telecom Service Provider should be asked to supply and fit an analogue

line and an NTP with terminals near the alarm system. The alarm installer

should then follow steps 1, 2 and 4 below. See Fig 10.

Note : If Dualcom is connected to the PSTN line and a telephone or other

equipment is sharing the same line (Parallel Connection) the bell in the tel-

ephone may tinkle when Dualcom is operating. Dualcom alarm calls to the

Alarm Receiving Centre will also be inhibited. See previous page.

Series Connection (Dualcom & other equipment on line)

Your Telecom Service Provider should be asked to supply and fit an analogue

line and an NTP with terminals near the alarm system. The alarm installer

should then follow steps 1 - 4 below. See Fig 11.

1. Use cable type 1/0.5mm CW1308, feed through the cable entry, connect

the cores to the Dualcom terminals marked A and B.

2. Connect the other end of the cable to the Terminal Block connections for the

incoming telephone line, marked A & B, or 2 & 5.

3. If the PSTN line used by Dualcom is shared with other apparatus (e.g. tel-

ephone, fax or answer machine) connect the terminals marked A1 and B1

on the Dualcom to a PSTN Socket. (Terminals 1 & 6 in the NTP can be used

as ‘loop in points’ for this purpose). The customer may then plug their phone,

fax etc, into that socket.

4. On Dualcom and other equipment with an Earth or ‘E’ terminal, connect a

1.0mm earth cable to Terminal E. Ensure that the other end of this earth

cable is connected to a good ground earth. This protects the equipment

from high voltages, e.g. lightning, that may strike the telephone line. Refer

also to the ‘Safety Earth’ section.

Fig 10 Fig 11

Dualcom

To Eart h

PSTN

Ter mina l

Block

PSTN

Line

Dualcom

Other

Apparatus

To E art h

PSTN

Terminal

Block

PSTN

Line

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Connect Systems CS1001 Manual de Instalação Página 24