Siemens S5-135U/155U System Manual page 241

Jumper Settings of
When the V.24 submodule is delivered, the jumpers are set as shown in the
the V.24
following figure. As a rule, you can therefore use the V.24 submodule
Submodule immediately.
Figure 5-15
You can change over the polarity of the transmit and receive data with
jumpers J3 and J5.
J3
J5
System Manual
C79000-G8576-C199-06
CPUs, Memory Cards, Memory Submodules, Interface Submodules
Front Connector
25-Pin Sub. D-Type
Br9
J3
J4
Br8
Backplane Connector
V.24 Submodule: Jumper Settings when Delivered
1 2
Br6
Br5
J2
J1
Br7
3
Transmit data in normal polarity
Transmit data negated
Receive data in normal polarity
Received data negated
5-101