29
ADSL (Asynchronous Digital Subscriber Line) or ‘Broadband’
PSTN Connection
using the
CS0730 Security ADSL Filter
Fig 16
Q.
Why is a Broadband Filter necessary ?
A.
When ADSL (Broadband) digital data is supplied on a normal PSTN tele-
phone line then an ADSL (Broadband) Filter
must
be fitted between that tele-
phone line and each item of ‘non digital’ equipment because:
1). 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.
2). The operation of the ADSL (Broadband) equipment may be
disrupted or
completely inhibited
by the connection of unfiltered ‘non digital’ equipment to
the telephone line.
‘Non digital’ equipment means anything that can be used on a normal analogue
PSTN telephone line, e.g. a Phone, Fax, DualCom, Control Panel Digi-Modem.
DUALCOM
