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INSTALLATION-OK 16 KSU & PCB
SECTION 100-816-205
MARCH 1993
50-PIN AMPHENOL CONNECTOR (FEMALE)
I .
SSTU
SUBUNIT
WI Ring Voltage
H=190VP-P
L= 130v P-P
(For PSTUI (V.4)
and PSTU2 only)
BACKPLANE CONN
FIGURE 5-15
PSTU AND SUBUNIT (SSTU)
TABLE 5-C
PSTU CONTROLS AND INTERFACE CONNECTORS
CONTROL/INDICATOR/
CONNECTOR
TYPE OF COMPONENT DESCRIPTION
(Figure 5-15)
Ring Voltage Wl Jumper Three-terminal jumper
Plug (PSTUl
(V.4)
and
PSTU2 only)
Sets ring generator voltage level for all
circuits.
H=190VP-P
L = 130v P-P
NOTE:
9.13
Unlike the PEKU or PESU, the PSTU does not
PSTU 1
(V.4)
became available in November
1989. PSTU 1 (V.3) was discontinued.
have to be configured for BGM: There is no jumper
wire to cut, etc.
9.12
Set the PSTUI (V.4) or PSTU2 ring generator
level as required:
l
Wl
set to H (19OV P-P).
l
Wl
set to L (13OV P-P).
l
Two ringers maximum per port (H or L).
9.20 PSTU Installation Procedure
9.21
Install the PSTU in accordance with the fol-
lowing steps:
1) Remove the PCB from its protective packag-
ing. The protective shield on the back of the
PSTU is designed to protect the installer from
5-21