AT&T MERLIN LEGEND System Reference Manual page 258

Features
Single-Line Telephones
Considerations
Feature Interactions
Alarm
Conference
Direct Station Selection
Inspect cannot be used on MLX telephones without display or on analog
multiline telephones.
Inspect cannot be used on single-line telephones.
If the company subscribes to special services, such as AT&T's INFO2
automatic number identification (ANI) service, the user can see the outside
telephone number of the person calling.
Note: The availability of the caller identification information may be limited by
local-serving (caller's) jurisdiction, availability, or CO equipment.
If a line button is being inspected, it cannot be used to make or receive a
call.
If a user inspects a line that someone else is using, the display shows that
the line is in use.
If Inspect is activated and someone makes a voice-announced call or a
Group Page to the user, the inspect feature is canceled and the Home
screen is displayed.
If the user presses the Feature button or Menu button while Inspect is
activated, Inspect is canceled.
Inspect can be used on an MLX DLC or a QCC to display the number of alarms;
an analog DLC cannot use Inspect.
If the user presses the Conference button while Inspect is activated, Inspect is
canceled and the system tries to activate the Conference feature.
When a conference participant joins a conference using a shared outside line or
Shared System Access button, the queued call console (QCC) display reflects
the correct number of participants. However, if the QCC system operator uses
the Inspect feature to verify the number of participants, the number shown on
the display does not include participants joining the conference on a shared
button.
Inspect can be used to determine the corresponding extension for each DSS
button. To use Inspect, the user presses the Page button for the range of
extensions, presses Inspect, and presses each individual DSS button to see the
contents. The user can display information on only one page number at a time;
to see information for another range of extensions, the user must press the
Home button and repeat the process.
If a message is posted at an extension associated with a DSS button, the
message is shown on page 2 of the display when the system operator inspects
the DSS button.
Inspect 2-209