Polycom SoundPoint IP 450 User Manual

Customizing Your Phone
75
• Backlight On Intensity—the brightness of the screen when you press a key,
have an incoming call, end or hold a call, or a call is resumed by the
another party. You can set a high, medium, or low level.
• Backlight Idle Intensity—the brightness of the screen after the phone has
been idle for a certain number of seconds (as defined by the backlight
timeout). You can set a high, medium, or low level.
• Maximum Intensity—the entire backlight intensity scale. For example, if
you decrease the Maximum Intensity, the Low, Medium, and High values
for the Backlight On Intensity and the Backlight Idle Intensity will
decrease proportionally.
If you do not press any keys on the phone, after 20 seconds of the backlight
turning on (the default backlight timeout), the backlight changes to the
Backlight Idle Intensity. If one of the following phone events is taking place,
the backlight changes to medium:
• A call is in progress
• A call is on hold
• There is an incoming call (ringing)
• There is an outgoing call (ringing back)
• Any menu shows on the display
To modify the backlight intensity:
1 Press .
2 Select Settings > Basic > Backlight Intensity.
3 Select Backlight On Intensity.

Polycom SoundPoint IP 450 Specifications

Display

display resolution	256 x 116 pixels
display type	backlit grayscale graphical LCD
display backlight	LED backlight with custom intensity control

Audio Features

frequency response	150Hz - 7kHz
codecs	G.722, G.711 μ/A, G.729A, iLBC
full-duplex speakerphone	Type 1 compliant with IEEE 1329

Power

power over ethernet	IEEE 802.3af Class 2
external AC adapter	24VDC/12W
power adapter	Universal, auto-sensing

Operating Environment

operating temperature	0 to 40°C (+32 to 104°F)
storage temperature	-40 to +70°C (-40 to +160°F)
relative humidity	5% to 95%, noncondensing

Size and Weight

dimensions	8.5 x 6 x 6.5 in x 2.5 in (21.5 x 15 x 16.5 x 6.5 cm)
box dimensions	12.5 x 13.25 x 3.5 in (31.75 x 33.5 x 9 cm)
unit weight	2.4 lbs (1.1 kg)