0049-2702-XXX Alliance Series Modems – USER MANUAL
08/05/2010
Rev. A
Page 29 of 197
Symbol
Options
-
Asymmetric Symbol Rates
Hayes, V.25bis, dumb, leased line modes (V.34 operation only)
This option allows you to specify whether the modem’s transmitter and receiver symbol rates
will always be equal (symmetric) or whether they may be different from one another
(asymmetric).
(To set maximum and minimum symbol rates, see the
Speed Limit
section. To specify
symmetric or asymmetric data rates, see
Asymmetric Data Rates
later in this section.)
ENABLE
Allows the transmitter and receiver symbol rates to be different.
DISABLE
Forces the symbol rates to be equal – both are equal to the lower symbol rate (i.e.
transmitter rate or receiver rate).
-
Optional Symbol Rates
Hayes, V.25bis, dumb, leased line modes (V.34 operation only)
Three symbol rate options are available through the OPTIONAL SYMBOL screen: These
options allow you to specify whether or not optional symbol rates (3429, 2800 and 2743 sym/s)
will be supported when the ALX makes V.34 connections. First select
3429, 2800
or
2743
from the OPTIONAL SYMBOL screen, and then select
ENABLE
or
DISABLE
for the
selected rate. You can select Enable or Disable independently, in any combination, for the
three symbol rates.
Other V.34 Options
-
Asymmetric Data Rates
Hayes, V.25bis, dumb, leased line modes (V.34 operation only)
This option allows you to specify whether the modem’s transmitter and receiver on-line data
rates (28.8, 26.4, 24.0 Kbps, etc.) will be symmetric (always equal) or whether they may be
different (asymmetric).
(To set maximum and minimum data rates, see the
Speed Limit
section. To specify symmetric
or asymmetric symbol rates, see
Asymmetric Symbol Rates
in this section.)
