3.2 REAR CARD SETTINGS
The Model 1110ARC is compatible with two dual-fiber interface
cards, one with dual ST connectors and one with dual SMA connectors.
Both cards use an HD-26 female for the RS-232 interface. The
jumpers on both interface cards function identically. Figure 2 (below)
shows the location of the jumpers.
3.2.1 HOW THE JUMPERS WORK
Figure 3 (below) shows the 3-pin jumpers used on the rear card.
The strap enables or disables a particular function depending upon
whether it straddles pins 1 and 2, or pins 2 and 3.
DTE Shield (Pin 1) & FRGND (JB1)
In the connected (closed) position, this strap links DB-25 pin 1 and
frame ground. In the open (disconnected) position, pin 1 is “lifted” from
frame ground.
JB1
Position 1&2 = DTE Shield (Pin 1) and FRGND connected
Position 2&3 = DTE Shield (Pin 1) and FRGND not connected
5
6
Figure 3.
Orientation of interface card strap
Figure 2.
Model 1110ARC rear card jumper location
JB1
(pin 1 on right)
3 2 1
