F o r p r o d u c t i n f o r m a t i o n v i s i t w w w . h e l l e r m a n n . t y t o n . c o m o r c a l l 8 0 0 . 5 3 7 . 1 5 1 2
9
H E L L E R M A N N T Y T O N
N
HDA
ZDA
HDA
ZDA
HDA
ZDA
HDA
ZDA
RapidNet
Copper
Traditional
Fiber
Switch
Patch
Panel
RapidNet
Fiber
Server
CAT6A
Panel
Cable
Management
T H E
D A T A
C E N T E R
Horizontal Distribution Area
(HDA) The HDA serves as the
distribution point for horizontal
cabling and houses cross-connects
and active equipment for distributing
cable to the EDA. As with the MDA,
the standard specifies that fiber and
copper are installed in separate racks.
The standard also recommends locating
switches and patch panels close to
each other to minimize patch cord
lengths. An HDA is limited to 20,000
points/connections and the number of
HDAs in a data center is determined
largely by the size of the data center.
E R
