Telenetics 56 - Manual (Page 40)

AT Commands
Page 32
Additional Syntax Rules
Concatenating Commands after Extended Syntax Commands
Additional commands may follow an extended-syntax command on the same command
line if a semicolon (";") is inserted after the preceding extended command as a separator.
The semicolon is not necessary when the extended syntax command is the last command
on the command line.
Concatenating Commands after Basic Format Commands
Extended syntax commands may appear on the same command line after a basic syntax
command without a separator, in the same manner as concatenation of basic syntax
commands.
Issuing Commands
All characters in a command line must be issued at the same data rate, and with the same
parity and format.
The modem will ignore any command line that is not properly terminated. The modem
may consider 30 seconds of mark idle time between any two characters as an improperly
terminated command line. In this case the modem may or may not generate an ERROR
message. The modem will ignore any characters received from the DTE that are not part
of a properly-formatted command line.
If the maximum number of characters that the modem can accept in the body is exceeded,
an ERROR result code is generated after the command line is terminated.
The DTE will not begin issuing a subsequent command line until at least one-tenth of a
second has elapsed after receipt of the entire result code issued by the modem in response
to the preceding command line.
Executing Commands
Upon receipt of the termination character, the modem commences execution of the
commands in the command line in the order received from the DTE. Should execution of
a command result in an error, or a character be not recognized as a valid command,
execution is terminated, the remainder of the command line is ignored, and the ERROR
result code is issued. Otherwise, if all commands execute correctly, only the result code
associated with the last command is issued; result codes for preceding commands are
suppressed. If no commands appear in the command line, the OK result code is issued.