January 1969 | NTIA Technical Memo ERL TM ITS 212
Telecommunication Services Center User Manual
Harry E. Petrie; W. M. Roberts
Abstract: This manual describes services provided by the Telecommunication Services Center to support operation of high-frequency ionospheric communications systems. The communicator obtains services he requires by a TTY terminal in his facility. Use of a dedicated circuit TTY is described. Use of a non-dedicated circuit TTY is described in the appendix.
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