8.22 Understanding The DATAButton Light
The optional Data Interface Unit (DIU) providesconnections for your
standard multiline digital telephone and an IndustryStandard
Telephone(IST) device. The DIU enables you to switch between your
multiline telephone and an IST device(an industry standard telephone,
FAXmachine, modem, cordless telephone, or answering machine).
When you haveDIU (either local or remote) assigned to your multiline
telephone, your telephone will havea preprogrammed DATAbutton
labeled DATA by the systeminstaller. The DATALED will provide you
with the followingvisual feedback on the operating status of t he DIU.
DATALED DIU STATUS
Off Digital mode (multilinetelephone selected)
On (green) IST device selected but not active
On(red) ISTdevice busy
Flashing(red) ISTdevice ringing
If the DIU has been removed or is inoperable, the DATA LED will be
off.If this occurs, plug the multiline telephone into a digital station port.
•To selectthe multiline telephone (DATA LED on or flashing),
1. Press the preprogrammed DATAbutton. If a call is in progress on
the IST device,it will transfer to the multiline telephone if the
multiline telephone is offhook or in speakerphone operation. If the
multiline telephone is on hook,the call will be dropped.
•To selectthe IST device (DATA LED off),
1. Press the preprogrammed DATAbutton. If a call is in progress on
the multiline telephone, it will transfer to the IST deviceif that
deviceis off hook. If the IST device is on hook, the call will be
dropped. Youcan still receive visual messages via the LEDs and
LCD on your multiline telephone, eventhough the voice path is
routed to the IST device.
NOTE:If you transfer a line to your own multiline telephone then
press the DATAbutton, the IST device will ring.
Using The Other Telephone Features GCA70–245
8–22 LCD Speakerphone Reference Manual