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UMTS 1900 Indoor 2 iBTS
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40
Nortel
Networ
ks
Confidential
55
About
the
iBTS
DDM
(Dual
Duplexer
Module)
The
DDM
s
are
loc
ated
in
t
he
DDM
shelf
which
houses
three
DDMs.
The
DDM
is
used
in
outdoor
or
indoor
configur
ations.
Hardw
are
d
escript
ion
Figure
30
Front
vie
w
of
the
DDM
1
...
...
31
32
33
34
35
...
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49