Symbol CRD 1500, Руководство программиста

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CRD 1500 Modem/Charging Cradle Programmer’s Guide
Fn, Select Line Modulation
Description
Selects the line modulation according to the parameter supplied. The line modulation is
fixed unless Automode is selected. This command interacts with the S37 and the N
command. The parameter value, if valid, is written to S37 bits 0-4.
To select line modulation, we recommend that either the F command, or a combination of
the S37 and the N
command be used, but not both.
F0 Selects auto-detect mode. Sets N1 and sets S31 bit 1. In this mode, the
modem configures for automode operation. All connect speeds supported by
the modem are possible according to the remote modem's preference. The
contents of S37 are ignored, as well as the sensed DTE speed.
F1 Selects V.21 or Bell 103 according to the B setting as the only acceptable line
speed resulting in a subsequent connection. Sets N0, sets S37 to 1, and
clears S31 bit 1. This command is equivalent to command string ATN0S37=1.
F2 Not supported.
F3 Selects V.23 as the only acceptable line modulation for a subsequent
connection. Originator is at 75 bps and answerer is at 1200 bps. Sets N0, sets
S37 to 7, and clears S31 bit 1. This command is equivalent to command string
ATN0S37=7.
F4 Selects V.22 1200 or Bell 212A according to the B command setting as the
only acceptable line speed for a subsequent connection. Sets N0, sets S37 to
5, and clears S31 bit 1. This command is equivalent to command string
ATN0S37=5.
F5 Selects V.22 bis as the only acceptable line modulation for a subsequent
connection. Sets N0, sets S37 to 6, and clears S31 bit 1. This command is
equivalent to command string ATN0S37=6.
F6 Select V.32 bis 4800 or V.32 4800 as the only acceptable line modulation for
a subsequent connection. Sets N0, sets S37 to 8, and clears S31 bit 1. This
command is equivalent to command string ATN0S37=8.
F7 Selects V.32 bis 7200 as the only acceptable line modulation for a subsequent
connection. Sets N0, sets S37 to 12, and clears S31 bit 1. This command is
equivalent to command string ATN0S37=12. This setting also allows