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a1 a2 b 2 b 1
S 0 - TL N 1 IN
Internal
ISDN b us
Block diagram, emergency power module (NSP) (in this example
Fig. 35:
here: elmeg C48m / elmeg C88m)
S 0 - TL N 1 O U T
IS D N EXT IN
C o nnec ting c ab le
ISDN c o nnec ting c o rd
To c ab le term inal
b ay
"IS0 1 : IN T"
46
EXT O U T
ISD N EXT O U T
C o nnec ting c ab le
N etw o rk
To c ab le term inal
term inatio n
b ay fo r the
(N T)
PAB X
S0 4 : EXT
o r
S0 3 : EXT
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