Capacity And Cabinet Slot Information; Ps-1 Line Power Option - Toshiba strata CT Installation & Maintenance Manual

ISDN Interfaces
RBSU ST ref points
TE1
8
or
TA
1
TE1
or
TA
Figure 10-5 RBSU/RBSS Interfaces between the S/T Reference Points

Capacity and Cabinet Slot Information

H
The RBSU/RBSS can be installed in any Strata CT slot except the programming telephone
PDKU or PEKU slot. On Strata CT, each RBSU contains two circuits and each circuit
reduces the system capacity by two station ports and two Exchange lines (one port/line per
B-channel). Therefore, if the RBSU PCB is installed, the station port and Exchange line
count will increment by four ports and four lines at the RBSU cabinet slot.
If the RBSU/RBSS is installed in a Strata CT slot, the station port and Exchange line count
will increment by eight station ports and eight lines at the RBSU/RBSS cabinet slot. RBSU
and RBSS PCBs can be installed in any combination so long as the number of RBSU PCBs is
C
the same or greater than the number of RBSS PCBs.

PS-1 Line Power Option

The RBSU provides an optional line power supply, R40S1A, that will supply line power to
TE devices. This power option only applies to RBSU or RBSS circuits that are configured in
the NT mode. See
Each of the four circuits on RBSU/RBSS can be connected to share the R40S1A using option
switches on the PCBs (see
make sure the TE devices do not require more power than the R40S1A can supply and the TE
is compatible with the ISDN PS-1 power arrangement.
the R40S1A.
10-10
BRI-NT
(4-wire)
RX
RBSU/RBSS
TX
S
S, T, and U are ISDN reference points.
TE = S-type Terminal Equipment
TA = S-type Terminal Adaptor
Figure 10-10 to install the R40S1A.
Table 10-5). Before using the R40S1A as a line power source,
BRI-TE
(4-wire) (2-wire)
NT1
RX/TX
T
Figure 10-6 shows the power limits of
Strata CT I&M Manual October 2000
BRI
ISDN
U