Zoom 2812 Owner's Manual page 52

Comman Function
d
&M0 Selects asynchronous mode (&Q0)
&P0 Make/break dial ratio of 39/61 at 10 pps
&P1, &P2, Commands accepted, but not acted upon.
&P3
&Q0 Selects direct asynchronous mode (no error correction
or speed buffering)
&Q5 Modem negotiates error-correcting connection
&Q6 Selects asynchronous mode with speed buffering (no error
correction)
&S0 Forces Data Set Ready (DSR) on continuously
&S1 DSR active after answer tone detected and inactive after
carrier loss
For engineering testing only
&T0 Ends test in progress
&T1 Starts local analog loopback test
&T2 Returns error
&T3 Starts local digital loopback test
&T4 Responds to remote modem request for digital loopback
&T5 Ignores remote modem request for digital loopback
&T6 Requests remote digital loopback without self-test
&T7 Same as &T6 with self-test
&T8 Starts local analog loopback with self-test
&V Displays the current (active) and stored profiles, and stored
numbers
&W0 Saves active configuration as profile 0
&W1 Saves active configuration as profile 1
&Y0
Modem uses profile 0 on powerup. (See &W0.)
&Y1 Modem uses profile 1 on powerup. (See &W1.)
&Zn=x Stores telephone number (up to 35 digits) x in
nonvolatile memory location n (0-3)
%C0 Disable data compression
%C1 Enable MNP5 compression
%C2 Enable V.42bis compression
%C3 Enables both MNP5 and V.42bis compression
%E0 Disables line-quality monitoring and auto-retraining
%E1 Enables monitoring and retraining
%E2 Enables monitoring and fallback/fall forward
%E3 Enables monitoring, retraining, and fast hang up
%L Reports received signal level in -dBm
%Q Reports line signal quality
\A0 64-character maximum MNP block size
\A1 128-character maximum MNP block size
\A2 192-character maximum MNP block size
\A3 256-character maximum MNP block size
\Bn In non-error correction mode, transmits line break to
remote modem in 100 ms units (1-9 with 3 as default)
\G0 Disables XON/XOFF (modem-to-modem) flow control
52 56K Faxmodem Owner's Manual