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Modem 34336
The CTS option is available for 4-wire Leased Line modes. It applies only
to 4-wire leased line applications using constant carrier.
• RTS — The CTS signal follows RTS.
• ON — CTS is always ON.
NOTE
The Modem also supports a CTS to EIA option, which is described earlier
in this chapter under EIA OPTIONS.
The RTS-CTS Delay (CTS Delay) option is available for V.25 bis, Dumb,
Leased line modes. The available RTS-to-CTS delay settings are 0, 15, 50,
or 150 ms. However, the only available choices for 208A/B operation are
50 and 150 ms. If you select 0 or 15 ms, the actual delay in 208A/B mode
will be 50 ms.
NOTE
RTS-to-CTS delay is not effective if the CTS option is set to ON (always
ON). For V.33 operation, RTS-to-CTS delay is effective only for 4-wire
leased line applications that use constant carrier.
The PHONE screen for storing a telephone number and Auto-Recovery
are discussed in Sections 4.2 amd 4.3.
The LCD Intensity option is available for all modes. It allows you to
use pushbutton 3 (for INC or increase) to darken characters on the
LCD or pushbutton 1 (for DEC or decrease) to lighten them.
3.3.9 O
PTIONS
A
CCESSIBLE
W
ITH
S
UMMARY
S
ETUP
O
NLY
The twelve options described below can only be changed through the
modem’s Summary Setup feature, which is explained in Appendix C.
The Wait For Carrier option is available for V.25 bis, Dumb modes. The time
the modem waits for a carrier signal when origin-ating a call can be set for 30,
45, 60, or 75 seconds. (In Hayes mode, the wait-for-carrier time is determined
by the value in register S7.)
The Phase Reversal in Answer Tone option is available for all modes. When
enabled, the Phase Reversal in Answer Tone option signals the telephone
network to turn off its echo cancelers. For virtually all applications, phase
reversal should be enabled (the default setting).
The Satellite Delay option is available for 208 mode. It facilitates transmission
over satellite links (but does not permit fast-turnaround operation). When the
Satellite Delay option is on, RTS is inhibited for 275 ms after the answer tone
stops and after the DSR signal comes on. The delay occurs at both the
originating and answering modems, allowing the echo suppressors on the
telephone link to be enabled.