PSTN Connection
using a Master Socket & the
D0730 Sercurity ADSL Filter
Fig 3
Serial Connection using a Master Socket
to a PSTN and Broadband telephone line is shown in Fig 3. This
allows a 2 wire connection to the NTP (which can make wiring easier) but requires the Installer to fit a Master
Socket.
A PSTN Master Socket type LJU2/4A is suitable and has screw terminals. These can be obtained from many
electrical distributors including:
CPC
Part Number: TE 00666
Farnell
Part Number: 916-638
Maplin
Part Number: FT48C
Rapid
Part Number: 24-0116
RS
Part Number: 472-534
The installer must ensure that:
1. The user’s telephone wiring is disconnected from the NTP and reconnected to the D0730 ADSL Filter only.
2. The NTP connects
only
to the D0730 ADSL Filter and to
no other
wiring or telephone sockets.
3. The wiring between the NTP and the the D0730 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.
2
Q.
Why is a Broadband Filter necessary ?
A.
When ADSL (Broadband) digital data is supplied on a normal PSTN telephone line then...
an ADSL (Broadband) Filter
must
be fitted between that telephone line and each item of ‘non digital’ equipment
because the operation of ‘non digital’ equipment may be
disrupted or completely inhibited
if ADSL (Broadband)
digital data is allowed into it from the telephone line.
‘Non digital’ equipment means anything that would be used on a normal analogue PSTN telephone line, i.e. a
Phone, Fax machine, Dualcom, Digital Communicator, Control Panel Digi-Modem.
DigiModem
Dualcom
etc.
