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CHAPTER 3: Configuration
3.2 Setting the Configuration Straps
The Async 232
↔
422/530 Card contains two sets of configuration jumpers,
which allow you to set the function of both front-panel “Carrier Detect” LEDs
and the CD signal exiting the rear interface card in the rack. Since the Async
232
↔
422/530 Card contains
two
converters, each unit can be configured
separately.
Both “Carrier Detect” straps can be set to “Normal” or “Always on.” When
operating normally, the “CD” LED will blink to indicate the presence or
absence of the carrier. When set to “Always on,” the CD LED will always
indicate that the carrier is ON. The table below summarizes the jumper
settings. The default position is “Always on.”
Interface Card Jumper Summary Table
Jumper
Function
Position 1 & 2
Position 2 & 3
JP1—Unit A
Carrier Detect
“Always ON”
“Normal”
JP2—Unit B
Carrier Detect
“Always ON”
“Normal”
3.3 Rear-Card Configuration
The Async 232
↔
422/530 Card has two interface-card options: the IC474C
(which comes equipped with two RJ-11 ports and two RJ-45 ports) and the
IC475C (which comes equipped with four RJ-45 ports). Figure 3-3 shows
these options.