Toshiba Strata DK40 Installation & Maintenance Manual page 115

RSTU Standard Telephone Interface Unit
RSTU
Standard Telephone Interface Unit
System:
Circuits per PCB:
Interfaces with:
Compatible Slot(s): slots 15 ~ 18
Older Version(s):
Only one telephone (or device) can be connected to a RSTU2 port. If more than one
telephone or device is connected to a port ringing may not function.
Notes
See Figure 3-12
9, for details of the PSTU and RSTU2 controls and indicators.
R48S -48 Volt Supply Installation (Internal Option)
Notes
Strata DK40 I&M Manual Spring 1999
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
DK40 Expansion KSU
eight standard telephone circuits
standard telephones
voice mail ports
off-premises stations
other similar devices
alternate BGM source (circuit 2 only)
auto attendant digital announcer
PSTU2–190V P-P or 130V P-P W1 jumper
For the system to recognise the DTMF tones generated by a standard telephone (or
any other device connected to a standard telephone port), a DTMF Receiver Unit
(RK5RCU) must be installed on the DK40.
Most standard telephones and two-wire devices require the 190V P-P level;
however, some devices may experience ring-trip with 190V P-P and should be set
for 130V P-P.
for an illustration of the PSTU2.
Mate the R48S connectors P6 and P7
connectors P6 and P7 on the RSTU or RSTU.
The R48S supplies an additional 24V (therefore giving 48V) to each two wire
circuit of the RSTU.
RSTU connectors P6 and P7 are positioned so that the R48S only fits in the proper
position.
P6
Figure 3-11 R48S Interface Connectors
DK40 Universal Slot PCBs
Figure 3-13 shows the RSTU2.
(Figure 3-11 and Figure
P7
See Table 3-
3-13) with the R48S
3-25