The communications circuits of this system are used when the telepathic circuits are unsuitable or unavailable. The receiver module can be accessed for maintenance by opening a panel beneath the Master Control Console. The Transceiver gathers non-telepathic signals through the Receiver Grid. After materialization, the TARDIS records all of a planet's radio signals and stores this information, filing it in the Data-Bank. The sensitivity is such that it can pick up TV broadcasts from anywhere on the planet the TARDIS is currently located on. The Transceiver can be used to "hack" into wireless computer networks, satellite communications, cell phone networks and land-line systems by using its scanners to map the electrical signals. The communications circuits process and intelligently sift though these transmissions looking for specified data. Using the light-speed overdrive, the chronospatial antennae can broadcast wavelength based messages through thousands of light years of space. The Transceiver also allows a TARDIS to jam all but the strongest non-telepathic communication signals.
While primitive radio transmitters will be incapable of receiving external signals while inside a TARDIS's Force Field, it is possible to physically patch them into the communications circuits so that signals can be relayed (in both directions) through the Interstitial Antenna.
The following color code is used:
- Black: For information from the TV Series, including Dimensions in Time, and 1996 TV Movie.
- Blue: For information from the Novels and Audios including Target, Virgin, BCC, and Big Finish.
- Green: For information from 'licensed' reference sources such as the Technical Manual, Doctor Who Magazine, and the Role Playing Games.
- Red: For information from unofficial sources -The Faction Paradox series, behind the scenes interviews, author's speculation, and popular fan belief.
The TARDIS Technical Index is copyright Will B Swift.