Programming instructions

Data Interface Unit
The Data Interface Unit, or DIU, is an optional external device that may be part
of your system installation. It provides connections for both your telephone and
an IST device such as a standard single-line telephone, a FAX machine, a data
modem, a cordless telephone, or an answering machine.
If the installer has arranged your station in this manner, you can switch between
your telephone and the IST device by pressing the DATA button that the installer
has programmed on your telephone. The light associated with the DATA button
provides status indications for your reference.
DATA Light Telephone Status
OFF Your telephone is selected for operation
On Green Your IST device is selected but is idle
On Red Your IST device is selected and is busy
Flashing Red Your IST device is ringing
·
To select your telephone if the DATA light is on or is
flashing,
1. Press the DATA button. If a call is in progress on the IST device,
it transfers to your telephone if you have your telephone handset
lifted or have your telephone in speakerphone mode. If you do
not, the call drops.
·
To select the IST device if the DATA light is off,
1. Press the DATA button. If a call is in progress on your telephone,
it transfers to the IST device if the device is off-hook; otherwise,
the call drops. Your telephone still provides visual messages and
indications even though its voice path is routed to the IST device.
Attendant Manual - DSU II Digital Expandable System 81
GCA70-245 Other Features