AT Command Set and S-Registers
4-8
Issue 2 May 1995
Table 4-1. AT Command Reference (7 of 18)
AT
Command Description
\A
n
MAXIMUM FRAME SIZE
This command determines the maximum frame (or block)
size used for V.42 or MNP error control operation. If the
telephone connection is poor, a smaller frame size may
improve the modem’s performance.
\A0
64 characters per frame
\A1
128 characters per frame
\A2
192 characters per frame
\A3
256 characters per frame
\A4
32 characters per frame
\A5
16 characters per frame
\C
n
SET AUTO-RELIABLE BUFFERING
This command determines whether or not the modem
buffers data received while it is negotiating the type of
connection to be used with a remote modem. Buffering
means the data is held in a temporary storage area until it
can be processed.
Online changes to this modem setting do not take effect until
a disconnect occurs.
\C0
Disabled. No data buffering is performed.
\C1
Enabled. Data is buffered until the connection
between the two modems has been established.
\C2
Disabled, switches after fallback character. No data
buffering is performed while the connection is being
established. The modem switches to normal mode
upon receipt of the auto-reliable fallback character
(set by the %A command) and passes it to the serial
port.
