Rts_Bias Jumper; Dcd Jumper; Cts_Gate Jumper - Canoga Perkins 2240 User Manual

Canoga Perkins
Local Loopback (LL) and Remote Loopback (RL) are loopback control leads and
perform the same functions as the 2240 front panel LOOP switch, LOC and REM
positions. LL and RL are interface signal inputs which can be used to activate the
LOC or REM loop functions. These signals can control the loopback functions
only if the front panel switch is in the center or OFF position.

4.5.1 RTS_BIAS Jumper

The RTS_BIAS jumper controls the state that RTS floats to when there is no signal
driving the RTS pin. The OFF position forces this signal to the OFF (negated) state
when the interface cable is disconnected. The ON position forces it to ON (as-
serted).
Factory Setting= OFF

4.5.2 DCD Jumper

The DCD jumper determines the source of the DCD output. In the CTRL posi-
tion, the DCD output functions as the output for the RTS input at the far end. In
the CD jumper position and with local RTS ON, CTS will turn ON either when the
modem's fiber optic receiver is in sync (main PCBA internal switch S1 CD /
DCD = OFF and CD / SYNC = ON) or the state of the RTS signal at the far end
(main PCBA internal switch S1 CD / DCD = ON and CD / SYNC = OFF). Refer
to Section 2.2.2.1 for more information on the internal switch S1 CD / DCD and
CD / SYNC positions.
Factory Setting = CTRL

4.5.3 CTS_GATE Jumper

The CTS_GATE jumper controls the state of CTS when the local RTS is ON.
When the jumper is in the ON position, CTS follows RTS only. The CD position
allows the 2240's standard data interface signal CD to gate CTS. In the CD
jumper position and with local RTS ON, CTS will turn ON either when the
modem's fiber optic receiver is in sync (main PCBA internal switch S1 CD /
DCD = OFF and CD / SYNC = ON) or the RTS signal at the far end is ON (main
PCBA internal switch S1 CD / DCD = ON and CD / SYNC = OFF). Refer to
Section 2.2.2.1 for more information on the internal switch S1 CD / DCD and CD
/ SYNC positions.
Factory Setting = ON
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