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15
ASYNC 232
↔
422/530 CARD
Table 3-1. Summary of jumper settings
Interface Card Jumper Summary
Jumper
Function
Position 1 & 2
Position 2 & 3
JB2
Line A Shield
Connected
No Shield*
JB4
Line B Shield
Connected
No Shield*
JB5
SGND & FRGND
Connected
Open*
JB6
DTE A DSR*
Connected
N/A
JB7
DTE B DSR*
Connected
N/A
*Indicates factory default
Line Shield (JB2 and JB4)
This jumper pertains to the line interface. In the connected position, the
jumper links RJ-11 pins 1 and 6 to frame ground and the rear panel. These
pins can be used as connections for the twisted-pair cable shield. In position
2 and 3, pins 1 and 6 (or RJ-45 pins 2 and 7) are disconnected from frame
ground.
JB2 and JB4
Position 1 & 2
= Line Shield A and B Connected to Frame Ground
Position 2 & 3
= No Shield