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Polycom, Inc. 110
To supply closed captions through a dial-up connection:
1 Ensure that the computer and the RealPresence Group system are configured to use the same
baud rate and parity settings.
2 In the web interface, go to Admin Settings > General Settings > Serial Ports.
3 Set the RS-232 Mode to Closed Caption.
4 Establish a dial-up connection between the computer and the RealPresence Group system.
a Connect a null modem adapter to the RS-232 serial port.
b Connect an RS-232 cable to the modem and to the null modem adapter.
c Connect the modem to a phone line.
d Configure the modem for 8 bits, no parity.
You may need to configure the modem to answer automatically. You may also need to configure
it to ignore DTR signals.
5 On the computer, start the transcription application.
6 Enter text using the stenographic machine connected to the computer.
7 To stop sending closed captions, close the transcription application.
Through the Serial RS-232 Port
Closed captioners can provide captions from inside the conference room, using equipment connected
directly to the serial port of the Polycom RealPresence Group system, as shown in the following diagram.
Closed captioning through the system serial RS-232 port
3 Modem
4 Phone line
5 Modem
6 RealPresence Group System
7 RS-232 serial port
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