Siemens HiPath 3000 Series Service Documentation page 429

Nur für den internen Gebrauch
Jumpers S2 and S3 for GND connection
You can set the GND connection (signal ground) of the receiving (Rx) and transmitting (Tx)
lines on the CAS side here.
GND connection
no signal ground (default)
signal ground on receive lines (Rx) on the CAS side
signal ground on the transmit lines (Tx) on the CAS
side
Recommendations for the GND connection:
symmetrical line (120 ohms)
●
Ground the cable's shield on the side of the connected device (NT, MUX, modem).
coaxial line (75 ohms)
●
Do not ground the shield on both ends of the cable.
– Tx: Ground the cable's shield on the TMCAS side.
– Rx: Ground the cable's shield on the side of the connected device (NT, MUX, modem).
A31003-H3590-S100-7-7620, 06/2012
HiPath 3000/5000 V9, Service documentation
Boards for HiPath 3000
Peripheral boards
Jumper setting
S2 = 1 - 2, S3 = 1 - 2
S2 = 2 - 3
S3 = 2 - 3
boards.fm
3-297