Rockwell

WARNING!

Rockwell is well-known on the modem market both in good and in bad positions. Its chipsets are similar to AT&T in command set and used in many modems, such as Dynamode, Prolink, GVC, Zoltrix and U.S. Robotics, however the last two is the worst two. Rockwell command set is very similar to the AT&T command set but has some differencies which are described below.

There is also so called RPI, Rockwell Protocol Interface which is used to overload PCs CPU with the emulation of error correction protocols. I inspected some RPI modems and did NOT find any such that would work properly. So I strongly recommend do NOT try use them.

See also: MNP10 Extended Services

Here presented commands which are specific only for the Rockwell command set:
F - analog of B-command extension in AT&T command set.
&K - modem-terminal flow control (equal to \Q in MNP command set).
%E - fallback/fallforward option (equal to %G in MNP command set).
%L - report received signal level (-dB). GVC used this command to set the transmit signal power.
%Q - report the line signal quality.
S24 - sleep inactivity timer (seconds).
S36 - LAPM (V.42/MNP) failure control.
S38 - delay before forced disconnect (sometimes appeared in AT&T chipset based modems).
S46 - data compression control.
S48 - V.42 negotiation action.
S86 - call failure reason code.
S95 - bit-mapped extended result codes option (this also appeared sometimes in AT&T modems).

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