5.2.11
Two wire extensions
Extensions
1
and
/
or
3
may both be configured as simple
telephones without key modules, these extensions are
limited to the facilities of making and receiving calls.
Extension
1
will ring to incoming calls on exchange line
1 ,
but extension
3
does not ring to incoming calls on
either line.
Both extensions must make all out going
intercom and exchange line calls via extension
2,
which
is called automaticall y whenever a two wire extension
lifts his handset .
Two wire extensions cannot use the
enquiry or transfer facilities,
set up conference calls
or use the system's divert and prog ramm ed ring ing
features.
Note that when a divert is set up to a two
wire extension, exchange line calls are not diverted.
Extensions
1
and
/
or
3
may be configured for two wire
working by changing the settings on the 4-way miniature
switch block in the CCU.
The switch block is located
next to extension
3
terminal strip on the main PCB.
Moving switches
1
and
/
or
2
to the "ON" position sets
extensions
1
and
3
for two wire working respectively.
See sec tion
5 .2.6
for the method to be used when
transferring calls to two wire extensions.
To make an intercom call from a two wire extension:
Lift the handset, if the intercom circuit is f ree
extension
2
will be called automatically, if the
circuit is busy try again later .
When extension
2
answers,
ask him to call the
required extension for you.
Extension
2
presses the required extension key, and
when the called extension answers announces the
call and replaces his handset.
A call is now
established between the two wire extension and the
called extension.
T o make an exchange line call from a two wire
extension:
Lift the handset, if the intercom circuit is free
extension
2
will be called automatically, if the
circuit is busy try again later.
When extension
2
answers, ask him to connect you to
an exchange line.
Extension
2
presses a free exchange line key and
waits for exchange dial tone.
Extension
2
then
presses the key of the two wire extension and
replaces his handset.
The exchange l i ne i s
transferred to the two wire extension who may then
dial the required number.
Alternatively extension
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