US Robotics COURIER Manual do Utilizador descarregar pdf (Página 126)

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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.

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