FiberPlex FOM-1090 - Manual (Page 17)

Configuring DIP Switch Parameters
(All default settings are OFF with exception of interface selection.)
Switch 1
Switches 1.1, 1.2, and 1.3: Interface Configuration
(The rear panel INTF led will indicate the current interface setting.)
Interface
Switch 1.1 Switch 1.2 Switch 1.3 INTF LED
X.21 Off On On 1 Flash
TIA‐232 On On Off 2 Flashes
V.35 On Off Off 3 Flashes
TIA‐449 On Off On 4 Flashes
TIA‐530 (422) Off On Off
5 Flashes
Default (TIA‐530) Off Off Off
TIA‐530A Off Off On 6 Flashes
Disabled On On On Solid Red
Switch 1.4: No Function
Switch 1.5: Data Invert
Changes the MARK condition for use with MIL‐STD type interfaces. The idle state for some MIL‐STD interfaces is the
opposite of TIA and this setting allows the conversion from those MIL signals to TIA or between opposite state MIL
interfaces when this switch is ON.
Off Negative MARK
On Positive MARK
Switch 1.6: Data Regeneration A (FOM‐1091 ONLY)
Enables FOM‐1091 auto or manual adjustment for regeneration of TD signal to DCE
Off Normal operation
On Enables various modes of TD out signal regeneration using ST signal from DCE in conjunction with
switch 1.7.
Switch 1.7: Data Regeneration B (FOM‐1091 ONLY)
Enables FOM‐1091 auto or manual adjustment for regeneration of TD signal to DCE.
Off Normal operation
On Enables various modes of TD out signal regeneration using ST signal from DCE in conjunction with
switch 1.6.
Switch 1.8: Invert Send Timing Out (FOM‐1090 only)
Inverts ST signal out of FOM‐1090.
Off No inversion
On ST out is inverted
Switch 1.8: Data Regeneration C (FOM‐1091 only)
Changes TD out relationship to ST in at FOM‐1091 when using Data Regeneration Switch. No function if Switch 1.6 and
Switch 1.7 are off
Off TD out transitions on rising edge of ST in
On TD out transitions on falling edge of ST in