CSL GradeShift User Manual

ISDN2 Home & Business Highway
Fig 19
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 19.
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.
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CSL GradeShift Specifications

General

Brand	CSL
Model	GradeShift
Category	Security System
Language	English