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If you must TAP an ISDN E1/T1/J1 installation that deploys coaxial wiring type you must use the
diagram below:
IS DN T 1 /T 1 /J1
B NC
T -sp l i tte r
RJ4 8C-B NC
A DA P T E R
There are in fact 2 coax cables to tap with E1/T1/J1. The actual tap is made by using a "BNC" T-
connector, one in each coax cable. The coaxial cables used are of 75 ohm characteristic impedance.
The cable between the BNC T-splitter and the APRESA should be less then 20 meter in length.
A Photo of the RJ48C BNC adapter
A photo of a BNC T-Splitter
INSTALLATION MANUAL APRESA
co a xi a l cab l e s
7 5 o h m
DWG 1 1 57 _ 0 0
COPYRIGHT © 2011-2017 VIDICODE ®
<20M
P B X
P B X
T O
DT P CA RD
56
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