DATA TRANSMISSION SYSTEM (TELTAP II). GENERAL DESCRIPTION, OPERATOR'S MANUAL AND PROGRAM DESCRIPTION.
Abstract
Telephone Tape (TELTAP II) is a software system designed to provide high-speed data transmission capabilities to and from a remote data processing center. The system transmits data for a magnetic tape station via a Control Data 8090 computer system, utilizing a CDC 8529 Data Set Controller to allow computer control of the transmission hardware. An encrypting device is used for security purposes. TELTAP II provides for transmitting any data capable of being recorded on magnetic tape in physical records not to exceed 3000 six-bit characters in length. The computer operators communicates by a direct line telephone between terminals to coordinate data transmissions. The program provides an effective data transfer rate of approximately 78.4/79.6 to 2400/4920 characters per second. This effective rate is dependent on the number of characters in each tape block (the longer records being more efficient due to fewer inter-record gaps on tape), and if the program has to perform its own pre/post processing ('Packing/Unpacking'). The program also provides a recovery procedure in the event that the communications equipment losses sync, and manual intervention becomes necessary. Error detection is included to minimize errors. This is done both in the transmission of data and in the handling of magnetic tape input/output. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 05, 1968
- Accession Number
- AD0671865
Entities
People
- Lester R. Straub
Organizations
- National Military Command System