Line Keys (On Multi-Line Phones Only) - Unify OpenScape Desk Phone IP 55G User Manual

Getting to know the OpenScape Desk Phone IP 55G

Line keys (on multi-line phones only)

The programmable keys on multi-line phones function as line or trunk keys. Each key that is as-
signed the "trunk" function corresponds to a line. This means up to eight lines can be configured
on the OpenScape Desk Phone IP 55G.
A distinction is made here between primary, secondary and phantom lines. Each of these line
types can be used on a private or shared basis
Primary line
All multi-line telephones have a primary line. This line can be reached in the usual manner via your
public phone number. Incoming calls are signalled on this line.
Secondary line
A secondary line on your phone is used as a primary line by another subscriber of the line trunk
group. Your primary line, which is configured on another telephone of a line trunk group, simulta-
neously functions as the secondary line on that telephone.
Phantom line
Phantom lines are not used as primary lines by any telephones in a line trunk group. Phantom lines
are established, for example, when the number of lines provided by a communications system ex-
ceeds the number of available telephones.
Line utilisation
• Private line: A line that is used by a single telephone. This line cannot be used as a secondary
line by another telephone.
• Shared line: A line that is configured on multiple telephones. The line status (if configured) is
displayed on the "Overview" tab for all telephones that share this line. If, for example, a shared
line is being used by a telephone, a status message indicating that this line is busy is displayed
on all other telephones that share this line.
• Direct call line: A line with a direct connection to another telephone.
The line status is indicated by the LED in addition to the display on the "Overview" tab
LED displays
LED
To avoid conflict between individual multi-line phones, the functions "Do not disturb" and
"Call forwarding" can only be used for the primary line.
Meaning
Off: The phone is in idle mode.
Flashing:
• Incoming call on the line
• Hold reminder is activated
Flickering:
• Outgoing call on the line
• The incoming call was prioritised and selected in accordance with the "Auto-
matic line selection for incoming calls" option
Fast blinking: The line is on "Hold".
Blinking: Call forwarding is activated
Illuminated: The line is busy
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