11
FINAL WORDS
The Sceptre
120
is fully tested and approved for connection to the British
Telecommunications Public Network.
11.1 CONNECTING TO A SWITCHBOARD
Where a switchboard and wiring are privately owned, direct connection
may be made by the authorised maintainer, British Telecom, or if
14
days'
notice has been given to the authorised maintainer, by another person.
11.2 COMPATIBLE INSTALLATIONS
The Sceptre
120
may be connected to the following types of installation:
1
Direct Exchange Lines (DEL's) to the Public Service
Telephone
Network (PSTN) which require telephone signalling in Multi Fre
quency (MF) Tones.
2
Extensions with new plan (plug and socket) arrangements
pro
vided with these DEL's.
3
Any of the Private Branch Exchange (PBX) accepting tele
phones with recall, signalling in Multi Frequency (MF) as listed
on the following page.
11.3 INCOMPATIBLE INSTALLATIONS
The Sceptre
120
is not suitable for connection to the following types of instal
lation:
1
Shared service (party lines).
2
British Telecom Private Manual Branch Exchanges
(Cordless
Switchboards) in the range two exchange lines, six extensions
capacity up to five exchange lines, twenty five extensions
capacity.
3
DC 'Code C' switchboards.
4
As an extension to a payphone.
IMPORTANT
The design characteristics of switchboards and telephones are such that not
all types of approved telephone will operate satisfactorily with all types of
switchboard. The Sceptre
120
is approved for use only with compatible
switchboards listed overleaf. Any other usage will invalidate the approval of
the apparatus if, as a result, it will cease to perform to the standard against
which approval is granted.
Furthermore, it can not be guaranteed that the telephone will operate cor
rectly under all possible conditions of connection to a compatible switch
board. Any cases of difficulty should be referred to your supplier.
