The table below provides an overview of interface strap functions
for the rear interface cards. Following the table overview are detailed
descriptions of each strap’s function.
DTE Shield (DB-15 Pin 1) & FRGND (JB3)
In the connected position, this strap links DB-15 pin 1 & frame
ground. In the open position, pin 1 is disconnected 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
Figure 8.
1001RCM11545 strap locations
INTERFACE CARD STRAP SUMMARY TABLE #2
Strap
Function
Position 1&2
Position 2&3
JB3
DTE Shield (Pin1) & FRGND
Connected* Open
JB4
FRGND & SGND (Pin 8)
Connected*
Open
* Indicates default setting
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3.3.2 Model 1001RCM13445 Rear Card Strap Settings
Figure 7 shows the strap location for the Model 1001RCM13445
(M/34/RJ-45) rear card. This strap determines whether Signal Ground
and Frame Ground will be connected.
SGND & FRGND (JB4)
In the connected position, this strap links Signal Ground and frame
ground. In the open position, signal ground is disconnected from frame
ground.
JB4
Position 1&2 = SGND and FRGND Connected*
Position 2&3 = SGND and FRGND Not Connected
*
indicates default setting
3.3.3 Model 1001RCM11545 Rear Card Strap Settings
Figure 8 shows strap locations for the Model 1001RCM11545 (DB-
15) rear cards. These straps determine various grounding
characteristics for the terminal interface and twisted pair lines. JB3 and
JB4 are user configurable.
23
Figure 7. M/34/RJ-45 strap locations
JB4
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