Toshiba STRATA DK14 Installation And Maintenance Manual page 666

ISDN Interfaces
RBSU/RBSS and TBSU Interface Units
sure the TE devices do not require more power than the R40S can supply and the TE is compatible
with the ISDN PS-1 power arrangement. Figure 14-6 shows the power limits of the R40S.
TE Device
Power sink
R40S Power Limits:
Voltage: 33.3VDC to 38.85VDC maximum
Current: 100mA maximum (25mA maximum per each RBSU/RBSS circuit)
Figure 16-7 Power Limits of the Backup Power Supply
16-16
TE
Pin 3
Pin 6
Pin 4
Pin 5
RJ45 Pin Nos. on
RBSU or RBSS
NT circuit
RX + Pin 3
RX - Pin 6
TX + Pin 4
TX - Pin 5
RJ45 Pin Nos.
on TE device
RBSU
R40S PS-1
Power
Source
4774
Strata DK I&M 6/00