Mitel 1000 Owner's Manual page 47

If 'Forward On No Answer' is enabled on an extension to forward
to an external number, external incoming calls will forward, but
internal calls will not. Forwarding an external call to an external
number ties up two exchange lines. Such calls are called trunk-
Note
to-trunk calls
Forwarding an external call to an external number ties up two
exchange lines. Such calls are called trunk-to-trunk calls..
To cancel a Forward on No Answer forwarding
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2.
Forwarding incoming calls
This feature allows any extension to set a forwarding for calls received on an
exchange line or IP Trunk.
Setting Incoming call forwarding from a system phone
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It is possible that an extension may misuse the external forward
facility.
WARNING
Cancel incoming call forwarding from system phone
If 'All Call Forward' is set incoming I/C Call Forward' is shown on the display.
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Conference Calls
This feature allows you to hold a three-way conversation between three
extensions, or between two extensions and a CO line, or between two
exchange lines and an extension.
To hold an Internal Conference
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From the Idle Menu, press the Scroll Down Key ( ) until 'Extension
Forward' is displayed
Select 'Forward on no answer'. The forwarding is automatically
cancelled and the display returns to the Idle Menu.
From the Idle Menu, press the Scroll Down Key ( ) until 'Incoming
Call forwards' is displayed and select it.
Select the line or IP Trunk.
Select the Option required and enter the destination number.
Select 'Answering Machine' to forward the calls to the answering
machine.
Press "Cancel I/C Call Forward".
The display will show the lines. Select the required line
Select the forwarding type to be cancelled.
When on a call, press the Scroll Down Key ( ) until 'Internal
Conference' is displayed.
Select 'Internal Conference'.
Select the extension to be included in the conference.
When the extension answers, select 'Conference' on the display.
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