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ADSL (Asynchronous Digital Subscriber Line) or ‘Broadband’
When an analogue PSTN telephone line also carries ADSL (Broadband)
signals and it is used by a security system e.g. DualCom, then a Security
ADSL filter MUST be used.
A filter is used to separate the analogue telephone signals from the ADSL
(Broadband) digital data signals because the
phone or security system
may
be
disrupted or completely inhibited
if ADSL (Broadband) digital data is
allowed into them from the telephone line.
The CSL CS0730 Security ADSL Filter is designed specifically for use with
security systems. It includes spare terminals to aid wiring that are labelled
‘Pass Through’. This item meets all of the requirements of the British and Euro-
pean telephone and security standards. See Fig 15.
CS0730
Security ADSL Filter
Fig 15
1. The user’s telephone wiring is disconnected from the NTP and recon-
nected to the CS0730 ADSL Filter only.
2. The NTP connects
only
to the CS0730 ADSL Filter and to
no other
wiring or telephone sockets.
3. The wiring between the NTP and the the CS0730 ADSL Filter can
not
be unplugged by the user.
4. The user can
not
plug a phone/fax etc. into the NTP.
5. The terminals 2,3 & 5, A & B and A1 & B1 are connected exactly as
shown in Fig 16.
Other types of filter and plug-in filters
should not
be used for Series Connection of a security sys-
tem to the telephone line.
Plug-in types are for
use with telephones, fax machines etc
. Plug-in
filters are available from the Telephone Service Pro-
vider and many electrical distributors including:
CPC
Part Number: TE 05454 or TE04070
Farnell
Part Number: 418-5328 or 506-0205
Maplin
Part Number: A61AK or A72AG
Serial Connection
to a PSTN (and Broadband)
telephone line is shown in Fig 16.
The installer must ensure that:
