Polycom 1 - Manual (Page 79)

Content and Closed Captions
5 - 7
Closed captions are supported between Polycom HDX systems with software
version 1.0 or later and Polycom VSX™ systems with software version 7.0 or
later.
Captions may be provided in any language that uses the Latin alphabet.
The captioner may enter caption text using one of the following methods:
• Remotely, via a dial-up connection to the system’s serial RS-232 port
• In the room using equipment connected directly to the serial port
• In the room or remotely, using the web interface
• In the room or remotely, using a Telnet session
Via a Dial-Up Connection to the Systems’ RS-232 Serial Port
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
Polycom HDX system, as shown in the following diagram.
To supply closed captions via a dial-up connection:
1. Ensure that the computer and the Polycom HDX system are configured to
use the same baud rate and parity settings.
2. Go to System > Admin Settings > General Settings > Serial Ports and
set the RS-232 Mode to Closed Caption.
Stenograph
machine
Line 21
modem
format
PC with computer-aided
transcription software
Modem
Modem
Phone line
Polycom
RS-232
HDX System
Serial