Polycom TransTalk 9000-Series - Manual (Page 177)

Caller ID Inspect (F17)
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4. Press f 1 7 .
5. Program another button for this extension or exit programming mode.
Using
1. While active on a call, press the programmed button.
The green light flutters. Caller ID Inspect is activated.
2. Press a line, pool, or intercom button.
The Caller ID or Call Coverage information for the selected line, pool, or
intercom displays.
3. Press the programmed button to deactivate the feature.
The feature is deactivated automatically if you hang up the handset or
press any button other than a line, pool, or intercom button. The green light
is off when the feature is deactivated.