Isdn - BT Revelation Owner's Handbook Manual

ISDN (Integrated Services
Digital Network)1
A digital exchange line enabling
voice, data, still images and
video communication to be
transmitted simultaneously.
The BT ISDN Access Unit
provides ISDN2 voice services
all to
to devices connected a BT
Revelation system.
Key system
A small telephone system in
which each extension has keys
enabling it to act as a mini­
switchboard.
Last Number Redial
A facility which enables you to
redial the last number you
dialled by pressing just one
key.
LD (Loop Disconnect)
A system of pulse dialling. This
type of signallin g is used only
in the older type of phone, now
rapidly being replaced.
Message light
Message waiting.
See
Message waiting
A voice message has been left
on the voice messaging
system. This is indicated by
the MESSAGE light on a
Systemphone.
MF (Multi-frequency)
Tone dialling. This gives much
faster connection than LD and
is used by the majority of
telephones. You need tone
dialling to access BT' s
Network Services.
MOH (Music on Hold)
The system plays music to
callers who have been put on
hold.
1The BT Revelation ISDN
Access Unit must be
comnnected to your BT
Revelation system to avail of
this ISDN Network Service
MSN (Multiple Subscriber
Number)1
Your network provider may
provide you with up to 10
individual numbers on each

ISDN2

line. These numbers
may be used to route calls
directly to extensions or other
ISDN
devices.
MUTE key
This key switches between
receive only (mute) and
normal two-way transmission.
With mute switched on, the
microphone is electronically
disconnected, allowing you to
hold a conversation with a
colleague, for example, without
the other party being able to
hear, and without putting them
on Hold. (This works in the
same way as the Secrecy key
on many modern phones.)
Network Services
BT's Network Services give
you access to many advanced
features which are not
available as standard options
on the telephone network,
such as Call Waiting.
Night service
Night service allows you to
call
program a different set of
restrictions, and ringing. You
can set the time at which these
changes will come into effect,
and the time at which day
service will resume.
PABX
Private Automatic Branch
Exchange.
Pause key
When programming a speed
dial number, you may insert a
1.5
pause of seconds between
digits by using the pre­
programmed PAUSE key.
PIN (Personal
Identification Number)
The system PIN is a three­
digit number which must be
entered in order to gain access
to the system for programming
purposes. This number be
can
changed.
Programming extension
In default, extension 20 is the
main programming position,
but this be changed.
can
Certain activities may only be
carried out by the main
programming extension. These
are :
Setting day service/night
service manually, Setting the
auto answer feature, Recording
the personalised voice
greeting, Setting the
personalised voice greeting.
Glossary
Prompt keys
By pressing the prompt keys,
you will receive instructions
to
and codes tell you what to
do next. You even use the
can
call .
prompts during a phone
Refer to the section on the
Systemphune display
for details
on the Systemphone prompts.
PSTN
Public Switched Telephone
Network.
Speed dialling
Speed dialling enables you to
dial frequently-used numbers
using two- or three-digit codes,
or by pressing a single key.
There are two types of speed
dial numbers: system
numbers, which are
programmed into locations on
the system, and personal
numbers, which you
can
program onto your phone.
Systemphone
A special telephone with a
built-in display, which
incorporates a number of
features and facilities not
available to users of ordinary
telephones.
Time break recall
A measured time break in the
line to inform a PABX that a
user wishes to hold or transfer
a call.
Voice Module
An
add-on module which
allows you to play a pre­
recorded greeting to DISA
callers instead of a tone. It also
allows callers to leave recorded
messages.
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