User guide

24
Cisco TelePresence System Codec C90 Physical interface guide
D14644.03 Codec C90 Physical Interface Guide TC4.1, February 2011.
© 2010-2011 Cisco Systems, Inc. All rights reserved.
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GPIO and other connectors
GPIO
1 × GPIO (General Purpose Input/Output)
6 pins Phoenix plug, having 4 ports for On/O control, GND
a n d +12V.
You can congure input/output integrations by using pre–
dened behavior. Exposure of states and commands for
external control requires external programming.
For information about the API commands, see the API Guide
for the codec, go to:
http://www.cisco.com/go/telepresence/
docs
Usage information
• A contact closure between the GND and a GPIO port pin is
detected as a low input signal.
• When used for voltage inputs, the GPIO port detects it as:
• Low signal for voltages 0 - 1 VDC
• High signal for voltages 2 - 12 VDC
• When used for outputs, the GPIO port acts as a switch
to GND, and is rated for 500mA @ 48V DC. The +12V pin
provides +12 VDC, and is capable of sourcing up to 500mA.
• The GND connector is a common ground for all pins in the
GPIO port.
USB
1 × USB Host
1 × USB Device
For future use.
T Link
2 × T Link, RJ45 connector.
The cable for T Link out must be shielded.
For future use.
T Link
(for future use)
USB
(for future use)
GPIO
GPIO pin-out
+12V 4 3 2 1 GND
+12V 4 3 2 1
GND
Contents
Contact us
Introduction
The physical interface
Connecting to the codec
The physical interface