K56flex. A modem that can transmit data over ordinary telephone lines at a rate of 56 kbps (thousand bits per second).

KA band. The band width in the 20 to 30 GHz range.

kpbs. A measurement of data rate in thousands of bits per second that that travel through a channel in one second.

Kermit. A communications protocol used for file transfer or for terminal emulation.

Key pulsing. A telephone system that requires the caller to use the telephone key pad to dial a number.

Kilohertz. A measure of electromagnetic frequency in thousands of cycles per second. 1 KHz is equal to 1000 cycles per second.

Ku Band. The bandwidth in the 11 to 14 GHz range used for medium-power satellites.