0049-2702-XXX Alliance Series Modems – USER MANUAL
08/05/2010
Rev. A
Page 54 of 197
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Training Length
V.29, V.27 modes
If you select the 2-Wire Dial V.27 Quick Setup, the Training Length option is automatically set
to TER (V.27ter).
For V.27bis leased line operation, select LONG if the line quality is poor. Select SHORT if
the line quality is good.
For V.29 mode, the training length is set automatically when you select any of the three V.29
Quick Setup configurations (LONG for 4-Wire Leased Line V.29 mode, SHORT for the V.29
Fast Master/Fast Slave modes). For V.29 operation, do not change these automatic settings.
LONG
The training length will be long, as specified by ITU-T Recommendation V.27bis.
SHORT
The training length will be short, as specified by ITU-T Recommendation V.27bis.
TER
This setting selects V.27ter training. The first train is long (to establish the connection),
and subsequent ones are short.
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Carrier Type
V.33, 208, V.3x/208, V.29 modes (but not V.29 Fast Master/Fast Slave modes)
SWITCHED (SWITCH)
Switched carrier operation. Required for 2-wire applications. For
V.33 switched carrier operation, RTS must be high for the modems to train and for CD to go
high.
CONSTANT
Constant, or continuous carrier operation. Can only be used for 4-wire leased
line applications (although 4-wire leased line applications may also use switched carrier.)
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CTS
V.33, 208, V.3x/208, V.29 modes (but not V.29 Fast Master/Fast Slave modes)
This option applies only to V.33 and V.29 leased line applications that use constant carrier and
Bell 208 half-duplex modes.
RTS
The CTS signal follows RTS.
ON
CTS is always ON.
