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CTS to EIA
Hayes, V.25 bis, Dumb, Leased-line
modes (except V.33)
Regardless of the setting selected
for this option, Clear to Send
(CTS) goes low. When DCD goes
high during a V.42 error correction
handshake or when DCE-DTE flow
control is set to CTS on/off and a
connection has been established
with error correction or buffer
mode enabled.
NORMAL. The Clear to Send
signal is on while the modem is
on-line.
RTS. The CTS signal immediately
follows the RTS signal with no
delay.
TRUE. The CTS signal follows
DTR.
CTS can also be set to be ON at
all times regardless of DTR by using
the Summary Setup feature.
(However, if CTS on/off has been
selected from DCE-DTE screen 1,
V.42 flow control, while active, will
override the CTS ON selection.)
To set CTS ON, refer to
Appendix B, Fig. B-4 , EIA
INTERFACE OPTIONS diagram.
Note that if you set CTS to ON
using Summary Setup and then
make a selection from the CTS to
EIA screen, the selection from the
CTS to EIA screen will cancel the
Summary Setup (CTS ON)
selection.
CHAPTER 3: Options: Customizing the Modem Setup
CD to EIA
All modes
NORMAL. Carrier Detect (CD)
is on while the modem is on-line.
TRUE. CD follows DTR supplied
from the DTE.
TOGGLE. CD turns on whenever
DTR is present and then toggles off
for 500 ms upon DTR disconnect,
allowing the attached DTE to
recognize that the call has ended
and the connection has been
dropped.
DSR to EIA
All modes
NORMAL. Data Set Ready (DSR)
is on while the modem is on-line.
TRUE. DSR follows DTR
supplied from the DTE.
CROSSOVER (XOVER). DSR is
ON without DTR and toggles for
500 ms upon local or remote
disconnect.
NOTE
The modem also supports a
CTS option intended only
for V.33 and Bell 208A/B
operation,
which
described later in this
chapter under V.33 and Bell
208A/B Options.
is
59
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