Call Up

Initial voice contact between a facility and an aircraft, using the identification of the unit being called and the unit initiating the call.

Source: Pilot Contoller Glossary (PCG)

Reference:

#
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z