Building A Command Line; S Registers; Bitmapped S Registers; Description Of At Commands And S Registers - Bausch Proxima ISDN Lite Manuel D'utilisation

5.1.6

Building a command line

A command line opens with the lette rs AT, derived from the English word ATtention. The letters AT should both be either
upper-case or lower-case. The command line is followed by <ENTER>. A command line may contain one or more commands.
A command line has an 80-character limit.
NB The terminal adapter memorizes the last command line. It can be repeated by typing: A / (without <ENTER>).
Commands may be space-separated for sake of clarity. Spaces are included in the command line character count.
Sometimes a command is followed by a parameter (number). If the number is 0, it may be left out. For example: ATE0
corresponds to ATE.
The Terminal Adapter recognizes the terminal baud rate and parity from the initial letters AT in the command line. The Terminal
Adapter gears itself to it. Automatically recognized speeds are 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200
bps. The recognized data formats are: 7-bits or 8-bits characters with even, odd, or no parity bit and 1 stop bit.
5.2

S Registers

A number of terminal adapter settings have to be done by means of S registers.
A number of registers have one meaning (function). Other registers have several functions and are called bitmapped registers .
In these registers, settings or commands are done at bit level. The following section explains what bitmapped means. A
detailed description of the commands including the accompanying parameters can be found from section 3.4 onward.
5.2.1

Bitmapped S registers

In bitmapped S registers, a function is switched on or off per bit. '1' means the bit is on or 'set' ; '0' means the bit is off or
'reset'..
These bits from the binary system represent a decimal value. Bit 7=128, 6=64, 5=32, 4=16, 3=8, 2=4, 1=2 en 0=1. If you add
the decimal value of the bits that are '1' , the result is the value that has to be set in the register.
5.3

Description of AT commands and S registers

In the following sections, meaning and contents of AT commands and S registers are discussed. A great number of S
registers have specific technical meanings. It is therefore not advisable to change an S register setting if you are not sure of
the consequences.
The Value column indicates the values to be set.
The Def. column gives the default value for that command.
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