DATA TERMINALS FOR COMMUNICATIONS

Brand	Owner	Address	Description
EXTEL	EXTEL CORPORATION	4411 47TH AVENUE SACRAMENTO CA 95824	DATA TERMINALS FOR COMMUNICATIONS, COMPUTERS AND WORD PROCESSING, INCORPORATING PRINTERS, KEYBOARDS, TEXT DISPLAY UNITS, MAGNETIC DISC DRIVES, PAPERWINDERS AND MODEMS, AND POWER SUPPLIES, AND PARTS THEREFOR; PAPER TAPE PERFORATORS AND TAPE READERS; MULTI-PORT DATA COMMUNICATION SWITCHES; RECORDED PROGRAMS FOR DATA TERMINALS AND DATA COMMUNICATION SWITCHES; AND BLANK AND/OR PRERECORDED MAGNETIC DISCS;EX TEL;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

In a data communications system a remote data source outputs data as a series of application data units (ADUs). Each ADU is individually encrypted with a different key. The keys are transmitted (for example using Internet multicasting) via a communications network to one or more customer terminals. At the terminals a sequence of keys is generated for use in decrypting the ADUs. A record is kept of the keys generated, and this record may subsequently be used to generate a receipt for the data received by the customer. The keys may be generated, and the record stored within a secure module such as a smartcard.