Technical Specifications
• Physical and Operating Environment Specifications, page 1
• Cable Specifications, page 2
• Phone Behavior During Times of Network Congestion, page 3
Physical and Operating Environment Specifications
Specification
Value or Range
Operating Temperature
0°C to 40°C (32° to 104°F)
Operating Relative Humidity
10 to 95% (noncondensing)
Storage Temperature
14 to 140°F (-10 to 60°C)
Operating Altitude
-500 to 6,500 ft. (de-rate 1°C per 1000 ft.)
Dimensions
(HxWxD)
• Base: 10.38 x 10.38 x 2.0 in. (15.05 x 26.35 x
5.08 cm)
• Control panel: 5.75 x 5.0 x 1.0 in. (14.61 x 12.7
x 2.54 cm)
• Microphones: 3.5 x 2.5 x 0.5 in. (8.89 x 6.35 x
1.27 cm)
• Charger tray: 6.5 x 4.5 x 0.75 in. (16.51 x 11.43
x 1.90 cm)
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide for Cisco Unified Communications
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Technical Specifications
Cable Specifications
Specification
Weight
Value or Range
• Base 3.50 lbs. (1,587.0 grams)
• DCU 0.56 lbs. (253.0 grams)
• Wired Microphones 0.15 lbs. (66.8 grams)
• Wireless Microphones 0.14 lbs. (64.7 grams)
• Charger 0.42 lbs. (191.9 grams)
Display
Power
3.25 x 1.5 in. (8.26 x 3.81 cm); 396 x 162 pixels
• AC/DC adapter (100-240 V~, 50-60 Hz, 500
mA)
• Power over Ethernet (48 V, 380 mA)
• Power interface cable
Conference Room Coverage
• 20 ft. by 20 ft Sound Base only
• 20 ft by 30 ft (Sound Base + Extension
Microphone Kit)
• > 30 ft by 40 ft (Two Sound Bases connected
in Linked mode)
Note
The Cisco Unified IP Conference Phone
8831 supports wired and wireless
microphones. The Cisco Unified IP
Conference Phone 8831NR supports only
wired microphones.
Audio Range
200Hz to 14kHz (wide band voice support)
Loudness
86.5dB at 0.5 meters
Cables
One 25-ft. CAT 5 network cable
Cable Distance Requirements
As supported by the Ethernet Specification, each
conference phone must be within 100 meters (330
feet) of a wiring closet.
Cable Specifications
The conference phone has the following cabling requirements:
• RJ-45 plug for the 25-ft. CAT 5 cable connection on the bottom of the conference phone
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide for Cisco Unified Communications
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Technical Specifications
Phone Behavior During Times of Network Congestion
• RJ-45 plug for the 25-ft. CAT 5 cable connection on the power interface cable
• 6-ft., 48-volt connector to the power interface cable
• (Optional) 25-ft Daisy chain connection cable for use with Linked Mode.
Phone Behavior During Times of Network Congestion
Anything that degrades network performance can affect Cisco IP Phone voice and video quality, and in some
cases, can cause a call to drop. Sources of network degradation can include, but are not limited to, the following
activities:
• Administrative tasks, such as an internal port scan or security scan
• Attacks that occur on your network, such as a Denial of Service attack
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide for Cisco Unified Communications
Manager 10.0
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Technical Specifications
Phone Behavior During Times of Network Congestion
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide for Cisco Unified Communications
Manager 10.0
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