Polycom VSX Series Administrator's Manual page 140

Administrator's Guide for the VSX Series
Via a Dial-Up Connection to the Systems' Serial RS-232 Port
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Closed captioners can provide captions from inside the conference room, or from
a remote location, via a dial-up connection to the serial port of the VSX system, as
shown in the following diagram.
Stenograph
machine
PC with computer-aided
To supply closed captions via a dial-up connection:
1. Ensure that the PC and the VSX system are configured to use the same baud
rate and parity settings.
2. Go to System > Admin Settings > General Settings > Serial Port and set the
RS-232 Mode to Closed Caption.
3. Establish a dial-up connection between the PC and the VSX system.
4. On the PC, start the transcription application.
5. Enter text using the stenographic machine connected to the PC.
6. To stop sending closed captions, close the transcription application.
Line 21
modem
format
transcription software
Phone line
Modem
VSX System
Modem
RS-232
Serial
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