Operation Manual

24 Getting to know your OpenStage phone
Trunk keys (on multi-line phones only)
Some of the programmable keys on multi-line phones can be set up as trunk keys by administrator.
Each key programmed with the "Line" function is handled as a line. This means up to 9 line keys
can be configured on OpenStage
80 SIP and up to 8 on OpenStage 60 SIP.
A distinction is drawn here between primary, secondary and phantom lines. Each of these line
types can be used on a private or shared basis
 Page 24.
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
The 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 in the line trunk group, simul
-
taneously functions as the secondary line on that telephone.
Phantom line
Phantom lines are not used as primary lines by any telephones in the line trunk group. Phantom
lines are established when the number of lines provided by a communications system exceeds 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 in 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.
• 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 in the "Overview" tab  Page 38.
To avoid conflict between individual multi-line phones, the functions "Do not disturb" and
"Call forwarding" can only be used for the primary line.