Vidicode APRESA Installation Manual page 47

If you must TAP an ISDN E1/T1/J1 installation that deploys
diagram below:
ISDN T 1/T 1/J1
BNC
T -spli tter
RJ48C-BNC
ADAPT ER
DWG1157_00
There are in fact 2 coax cables to tap. 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
coaxial cabl es
75 ohm
<20M
APRESA INSTALLATION MANUAL VIDICODE ©2012
coaxial
wiring type you must use the
PBX PBX
T O
DT P CARD
47