Cisco TelePresence PrecisionHD Camera
D14640.17 Cisco Telepresence PrecisionHD Camera Guide APRIL 2017 Copyright © 2017 Cisco Systems, Inc. All rights reserved. 28
Camera guide
Camera control with VISCA™
protocol
The information in this chapter applies to:
• PrecisionHD Camera 1080p12x
• PrecisionHD Camera 1080p4x
• Precision 40 Camera*
• PrecisionHD Camera 1080p2.5x
NOTE: Some of the VISCA™ commands do not apply to
the PrecisionHD 1080p4x, PrecisionHD 1080p2.5x and
Precision 40 cameras. These commands are marked with
an * (asterisk) throughout this section.
NOTE: The VISCA™ commands for PrecisionHD 720p
camera can be found in the MXP Reference User Guide for
System Integrators.
Go to:http://www.cisco.com/go/telepresence/docs
The camera uses an RS-232 control interface that resem-
bles the Sony VISCA™ protocol. The VISCA protocol
(Video System Control Architecture) is a Sony protocol for
synchronized control of multiple video peripherals.
VISCA™ is a trademark of Sony Corporation.
*Formerly PrecisionHD Camera 1080p4x S2
RS–232 Parameters
At startup, the communication parameters for the RS–232
interface must be set to:
• 9600 bits per second
• 8 data bits
• No parity
• 1 stop bit
• No hardware flow control
• No software flow control
All of the RS–232 parameters except speed are fixed
and not user configurable. The speed may be changed
by issuing the Speed command defined on the following
pages.
All control bytes are pure binary information, i.e. the control
bytes are not ASCII-encoded.
RS–232 commands and inquiries
You can find a list of all the available commands and
inquiries together with the results and comments on the
following pages.
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