Tbsu And Rbsu/Rbss Passive Bus Configurations - Toshiba STRATA DK14 Installation And Maintenance Manual

ISDN Interfaces
RBSU/RBSS and TBSU Interface Units
Important!

TBSU and RBSU/RBSS Passive Bus Configurations

The placement of S-type TE and TA devices on the BRI S-passive bus is critical for good TBSU
and RBSU/RBSS BRI circuit performance.
architectures that are known to work. In all installations, follow the guidelines of any of these
passive-bus models using the wire, cables, and jacks described in the previous paragraphs.
Figure 16-19 Simplified Short-branched Passive Bus
Figure 16-20 Branched Passive Bus
16-28
The correct placement of TRs on the Passive Bus is critical to ISDN BRI circuit
operation (see the following TBSU and RBSU/RBSS Passive Bus configurations
section).
TBSU or
RBSU/RBSS
NT-Mode
TR
RJ-45
3338
TBSU or
RBSU/RBSS
NT-Mode
TR
RJ-45
3339
Figures 16-19~16-22
850'
No more than 130' difference
*
between any 2 branches.
RJ-45 with
TRs
show four passive bus
TA and PC Com Port
ISDN Telephone
TE-1 PC Card
ISDN Telephone
Strata DK I&M 6/00