Specifications

Quick Start Guide FOM-40 Installation and Operation Manual
2 Installing FOM-40
Switch Description Values Default Setting
6 7
6 7
INT – Internal
clock
OFF OFF OFF OFF
INT – Internal
clock
ON ON
RCV – Receive
clock
OFF ON
CLK SEL
SW5/6-7
Selects the transmit timing
source
EXT – External
clock
ON OFF
Note: FOM-40 units with one of the Ethernet interface modules (IR-ETH or IR-ETH/QV) do not support external
clock.
DCD
SW5/8
Selects the transmit carrier mode ON – Transmit carrier is ON only if
RTS is high
OFF – Transmit carrier is constantly
ON
OFF
Note: When operating FOM-40 with one of the Ethernet interface modules (IR-ETH or IR-ETH/QV) set the
carrier to be constantly ON.
LLB, (LBE)
SW5/5
Loopback activation control:
Local loopback activation via
DTE pin 18 for V.24, RS-530 or
V.36 interface or pin "j" for V.35
interface
Remote loopback activation via
DTE pin 21 for V.24, RS-530 or
V.36 interface or pin "h" for V.35
interface
ON – Loopback activation from the
DTE is enabled
OFF – Loopback activation from the
DTE is disabled
OFF