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3.0 Modem Setup Options
The 208 Phase Detection option is for 208 mode.
• Normal — Conditions the modem’s 208 receiver for normal modulation
detection.
• Compensated — Conditions the 208 receiver for compensated
modulation detection for improved performance with older 208 modems.
The Answer Tone Detection is for 208 mode.
• Enable — Conditions the originating modem’s receiver to wait for answer
tone detection before going on-line.
• Disable — Conditions the originating modem to go on-line without
requiring answer tone detection. This setting accommodates operation
with automatic calling units that connect the modem to the line at the
end of answer tone.
The Multimode Handshake option is for Hayes, V.25 bis, and Dumb modes.
This option determines how long the Modem will attempt to handshake
with a V.32 modem before falling back to a lower speed.
• T1 Timer — If the T1 timer setting is selected, the modem will attempt
to handshake with a calling V.32 modem for the time specified by the T1
Timer option.
• V.32 bis ANNEX A — If the V.32 bis Annex A setting is selected, the
modem will handshake according to the conventions established in Annex
A of the CCITT V.32 bis recommendation. Handshaking using the Annex
A selection will generally be faster than handshaking based on the T1
timer.
NOTE
The T1 Timer option (Section 3.3.7, Modem Setups) is only effective if the
Multimode Handshake option is set to 0 (T1 timer).
Two additional options, Operating Mode Fallback and V.32 Speed Fallback,
are discussed in Section 4.9.