ISDN Interfaces
RPTU Installation
16-12
Strata DK I&M 6/00
Cable Installation
The RPTU PCB is shipped with a Toshiba RPRI cable kit for connection of the RPTU to a CSU.
Install the kit as shown in
Figure 16-4
Detailed Pinouts for ISDN PRI Cabling
Network Jack/RPTU Modular Jack
Pin
Function
1
Tip – Receives from the network (NT – TE)
2
Ring – Receives from the network (NT – TE)
3
Not Used
4
Ring – Transmits to the network (TE – NT)
5
Tip – Transmits to the network (TE – NT)
6
Not Used
7
Not Used
8
Not Used
ISDN PRI
Network
Jack
CSU
DB15
(female)
DB15
(male)
RPTU
2752
A
B
C
D
E
RJ45
Item
Description
A
1
Fifteen feet of CAT5 unshielded cable
B
One DB15 modular adapter (CSU to network jack)
C
One DB15 modular adapter (CSU to RPTU)
D
Thirty feet of CAT5 shielded cable
E
One Ferrite core
1. Cable A and D are straight-pinned data cables, not cross-pinned
telephony cables.
C
S
U
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
CSU Local Power
Adapter
Network
Interface
Jack
RJ48-C
or
RJ48-X
(8-pin
Modular)
1-T1
2-R1
3-
4-R
5-T
6-
7-Nu
8-Nu
1-T1
2-R1
3-
4-R
5-T
6-
7-Nu
8-Nu
RPTU
8-pin
Modular
Jack
1
2
3
4
5
6
7
8
3
11
9
1
1
2
3
4
5
6
7
8
3
11
9
1
3-T1
11-R1
3-
9-R
1-T
3-T1
11-R1
3-
9-R
1-T
CSU
DB15
Male
CSU
DB15
Female
Toshiba-supplied 8-wire modular
cord, straight-through pinning
(15 ft. CAT5, unshielded)
Toshiba-supplied 8-pin modular
cord to DB15 female adapter
Dealer-supplied CSU
Toshiba-supplied 8-pin modular
to DB15 male adapter
Toshiba-supplied 8-wire
modular cord, straight-through
pinning (30 ft. CAT5, shielded)
Toshiba-supplied Ferrite core
2753
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