User`s manual

U.S. Robotics I-modem Command Reference
Handshaking, Error Control, Data Compression, and Throughput • Page 11-17
This allows V.42bis compression to work dynamically with the com-pressed data, but dis-
ables MNP5.
Data Compression Commands
&Kn Enable/disable data compression.
&K0 Disable analog and TurboPPP data compression.
&K1 Auto enable/disable. Enable compression if the serial port rate is Þxed
(&B1). Disable compression if the serial port rate is variable (&B0)
because compression offers no throughput advantage when the serial port
and connection rates are equal (compression may even degrade through-
put).
&K2 Enable data compression. Use this setting to keep the I-modem from dis-
abling compression.
&K3 Enable selective data compression. The I-modem negotiates only for
V.42bis compression, and disables MNP Level 5 (MNP5) compression.
Use this setting to transfer 8-bit binary Þles, .ZIP Þles, and other Þles that
are already compressed.