Monitors
Power Management Systems
VESA Display Power Management
Because of the tremendous amount of energy consumed
by monitors when operating, the system will reduce power
consumption and extend monitor lifecycle by suspending the
(switch off) monitors and projectors when the system goes
into sleep/standby.
This applies for all VESA Display Power Management
compliant displays that are connected to the VGA/DVI output
of the system.
The display device needs to comply with VESA Display Power
Management System (DPMS).
NOTE
This requires a system supplied with a VGA/DVI output.
VESA - Video Electronic Standards Association
DPMS - Display Power Management System
EDID - Extended Display Identification Data
DMPM - Digital Monitor Power Management
VESA DPMS Standard
The VESA DPMS standard consists of 4 modes, Normal, Standby,
Suspend and Off, and applies to all Sync formats (e.g. VGA).
In Off mode some power may still be drawn in order to power indicator
lights etc. EDID contains the information on which mode a specific
monitor supports.
All four models are supported. However, in software version F1 and
above, all monitors not listed below are automatically set to Off.
Monitor vs DPMS Mode
Monitor
DPMS Mode
Dell
Off
Digital Monitor Power Management
DMPM - Digital Monitor Power Management is monitor power
management applied over the digital DVI interface. DMPM is
supported in software version F2 and above.
The following monitor power states are defined:
Monitor On Power state
Transmitter (Cisco codec) and receiver (Monitor) are powered
and active. This power state is equivalent with the DPMS normal
mode.
Intermediate Power state
When the codec goes from active to standby, it turns off the
DVI transmitter and the monitor can go from Monitor On
Active-off Power state
The monitor can go from Intermediate Power state to Active-off
Power state when the monitor timer expires.
Non-Link Recoverable Off Power State
The monitor can enter Non-Link Recoverable Off Power
State when the codec is switched off or if the DVI cable is
disconnected. This power state is equivalent to the DPMS “Off
(with no DPMS recovery)” state.
Monitor Power Switch Off Power state
This state can be entered when the power switch on the
monitor is toggled to its off position. This state has two sub-
states dependent on if the codec is switched on or off.
DPMS Standard
Normal
Standby
Suspend
Off
Horisontal
Sync
On
Off
On
Off
Vertical Sync
On
On
Off
Off
Power Savings
None
Minimal
Substantial
Maximum
Recovery Time
None
2-3
seconds
2-3 seconds
8-10
seconds
145
Cisco TelePresence MXP Series
Administrator guide
D14791.01 MXP Series Administrator Guide F90, August
2011.
Copyright © 2010-2011 Cisco Systems, Inc. All rights reserved.
www.cisco.com
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