Msg: 1935 *Conference*
03-13-92 15:50:08
From: DREW BLANCHAR
To : RICHARD HANSON
Subj: REPLY TO MSG #1904 (BUADOT CODES)
Rick, The files you listed are for Radio TeleTYpe. We were discussing baudot, which RTTY uses, but with the idea of using a MDL100 for TDD. The files you listed RTTY.BA & RTTY.DO use an external modem RTTY3.BA & RTTY3.DO are receive only and probably need external modem again The last file you listed, TTY100.BA uses the motor relay of the cassette port! For TDD use, the definition in our book is as follows: Signal 110 baud asynchronous Originating frequencies: Mark 1270 Hz Space 1070 Hz Answering frequencies Mark 2225 Hz Space 2025 Hz Bits/character: 11 1 start 7 data 1 Mark parity 2 stop Half Duplex ++++++++++++++++++++++++ The above is for the "ascII" mode. The book doesn't list all the spec.s for regular TDD (5-bit baudot?) but it's probably using the same frequencies as I can't imagine them building a lot of versatility into the TDD cases. Wait until you try the keyboard at the meeting... really strange like a crank phone.....3 rows o keys to cover some 64 characters. KGetting out now as the line noise is gruesome! -dB