32
MicroCSU/DSU Cards and MicroRacks
DTE Shield (Pin 1) & FRGND (JB3)
In the connected position, this strap links DB25 pin 1 and frame ground. In the
open position, pin 1 is “lifted” from frame ground.
JB3
Position 1 & 2 = DTE Shield (Pin 1) and FRGND Connected
Position 2 & 3 = DTE Shield (Pin 1) and FRGND Not Connected
SGND & FRGND (JB4)
In the connected position, this strap links DB25 pin 7 (Signal Ground) and frame
ground. In the open position, pin 1 is “lifted” from frame ground.
JB4
Position 1 & 2 = SGND (Pin 7) and FRGND Connected
Position 2 & 3 = SGND (Pin 7) and FRGND Not Connected
4.3.2 M
ICRO
CSU/DSU V35 R
EAR
S
TRAP
S
ETTINGS
Figure 21 shows the strap location for the MicroCSU/DSU V35 Rear (M/34/RJ-
48S). This strap determines whether Signal Ground and Frame Ground will be
connected.
Figure 21. M/34/RJ-48S strap locations.
Summary of Contents for MicroRACK RM208
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