Rbuu/Rbus Wiring Guidelines - Toshiba STRATA CTX100 Installation And Maintenance Manual

RBUU/RBUS Wiring Guidelines

Strata CTX BRI-U interface circuits can be configured to connect to an ISDN line circuit (NT
•
mode, line-side) or to ISDN U-type terminal equipment TE1 or terminal adapters TA (LT
mode, station side).
Install the Toshiba-supplied Ferrite core on each ISDN circuit card per
•
page 5-20. The Ferrite core is not supplied with the ISDN circuit cards must be ordered
separately.
For more information regarding the Strata CTX BRI-U interface, see "PRI and BRI Overview"
•
at the beginning of this chapter.
Line-side cabling
The ISDN BRI U-interface circuits are two-wire on the PSTN line-side.
•
The wiring from the demarc to the Strata CTX BRI circuit should be made with CAT3~CAT5
•
twisted pair wire.
The pinout of the Strata CTX BRI-U circuit jack is shown below.
•
Figure 5-24 Strata CTX BRI-U RJ45 Circuit Jack Printout
The maximum distance between the PSTN BRI interface circuit and the Strata CTX ISDN BRI
•
U line-side circuit (NT) is 18 kft. The Telco with the use of a repeater or fiber optic cable may
extend this distance.
The U interface pair should go directly from the demarc jack to the Strata CTX interface PCB
•
with no bridge taps to different locations or should not have loading coils installed.
BRI line-side cables should not be shielded.
•
Each line-side BRI circuit requires a ferrite core as shown in
•
In the USA, most BRI-U Demarc jacks are RJ11, but they may be RJ45 eight-wire jacks. In
•
Canada the BRI-U Demarc jack is usually RJ45.
Polarity of the U interface pair is not critical.
•
Strata CTX I&M 10/02
8
7
6
5
4
3
2
1
4732
RJ45 Jack
Figure 5-14
NT and LT Mode
NC
NC
NC
Tip
BRI Pair
Ring
NC
NC
NC
NC = No Connection
Figure 5-14 on page
ISDN Interfaces
RBUU/RBUS Interface Unit
on
5-20.
5-27