Technical Specifications

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)

Weight

  • 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

3.25 x 1.5 in. (8.26 x 3.81 cm); 396 x 162 pixels

Power

  • 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

  • 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 phone audio 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