27
ISDN2 Home & Business Highway
Fig 13
Home Highway, Business Highway
Home Highway or Business Highway is the marketing name for a ‘basic rate’
ISDN2 line supplied by BT with an NTE9 NTP.
The NTE9 NTP provides two digital sockets, it includes an ISDN-Analogue con-
verter and two analogue telephone sockets. This type of NTP can have an
analogue phone, fax, modem etc. connected at either or both of the analogue
telephone sockets.
Power for the NTE9 comes from the exchange equipment via the ISDN line
and
also from the mains supply at the users premises.
In the event of mains failure, the right-hand analogue telephone socket on the
NTE9 will cease to operate but all other functions are powered from the ex-
change equipment. It is important therefore to
connect DualCom
to the
left-
hand
analogue telephone socket on the NTE9. See Fig 13.
A
maximum
of two calls on an NTE9 may be in progress at the same time. If
two calls are in progress it is
impossible
to make another outgoing call or
receive another incoming call.
The ‘two call maximum’ means that if two calls are in progress then any other
calls in or out can
not
be made. This limit may make
this type of connection
unsuitable for DualCom.
