Toshiba STRATA CTX100 Installation And Maintenance Manual page 164

PCB Installation
BSTU/RSTU – Standard Telephone Interface Unit
50-Pin Amphenol
Connector (Female)
Figure 4-10 RSTU or RSTU2 Controls and Interface Connectors
4-14
P7 UP
Optional
Backplane Connector
P6
5809
SSTU
Subunit
R48S
R48S Installed
Installed on RSTU1
on RSTU2
Strata CTX I&M 10/02