Overview
Information is transferred through hardline and radio frequency links.

S-Band System
Operates in the S-band portion of the RF spectrum of 1,700 to 2,300 MHz.

Ku-Band System
Used only when the orbiter is on orbit.

Ku-Band Rendezvous Radar
Ku-Band system includes a rendezvous radar that skin-tracks satellites and other rendezvous targets.

Payload Communication System
Used to transfer information between orbiter and its payloads.

Ultrahigh Frequency System
Used as a backup fro S-Band PM and Ku-Band voice communications, primarily for EVAs.

Audio System
Interfaces with caution/warning system, UHF, S-Band, Ku-Band, and tacan systems.