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ISDN Interfaces
BPTU and RPTU Cabling
Strata CTX I&M 06/04 7-13
ISDN Interfaces
Ferrite Core
Install the Ferrite core provided with the RPRI cable kit as shown in Figure 7-7. This core is
needed to comply with FCC requirements.
Figure 7-7 Ferrite Core Installation
Figure 7-8 Direct Connect Two BPTU or RPTU2 PCBs for QSIG Networking
Ferrite Core
FER-CORE-ISDN
One Turn
CAT5 Shielded Cable
R
PT
U
S
id
e
V
i
e
w
5963
Tie Wrap
N
o
t
e
:
The Ferrite core must be
as close as possible to the RPTU.
ISDN PRI Jack
6644
Pin of one end to
of one end to of other end - each direction
To make a cross-pinned modular cord on a existing straight through cord:
On one end only, swap Pin 1 with Pin 5 and then Pin 2 with Pin 4.
of other end - each direction
Pin1
5
2
Pin
4
Pin
RJ45 Cable Cross Pinning
T
R
T
R
T
R
T
R
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
18
Front Front
18
Bottom Side Up
Connector Head
1
2
3
4
5
6
7
8
Connecting two BPTUs or two RDTU3s
BPTU or RDTU3 BPTU or RDTU3
Strata CTX PBX or Cable
Cross-Pinned, RJ45 Modular Cord
Ferrite Core
(655 ft. max. CAT5 wire)
RJ45 Network Jack
RJ45 Network Jack
1
2
5
4
5
4
2
1
Pin Pin
T
R
RR
R
TT
T
Important
Note:
Set SWs on
each BPTU
per Table 7-3