Cisco 8831NR Administration Manual page 156

Cable Specifications
Specification
Power
Conference Room Coverage
Audio Range
Loudness
Cables
Cable Distance Requirements
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
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide
146
Value or Range
• AC/DC adapter (100-240 V~, 50-60 Hz, 500
mA)
• Power over Ethernet (48 V, 380 mA)
• Power interface cable
• 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)
The Cisco Unified IP Conference Phone
Note
8831 supports wired and wireless
microphones. The Cisco Unified IP
Conference Phone 8831NR supports only
wired microphones.
200Hz to 14kHz (wide band voice support)
86.5dB at 0.5 meters
One 25-ft. CAT 5 network cable
As supported by the Ethernet Specification, each
conference phone must be within 100 meters (330
feet) of a wiring closet.
Technical Specifications