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Cisco 7841 Administration Guide

Cisco 7841
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Audio Problems
The following sections describe how to resolve audio problems.
No Speech Path
Problem
One or more people on a call do not hear any audio.
Solution
When at least one person in a call does not receive audio, IP connectivity between phones is not established.
Check the configuration of routers and switches to ensure that IP connectivity is properly configured.
Choppy Speech
Problem
A user complains of choppy speech on a call.
Cause
There may be a mismatch in the jitter configuration.
Solution
Check the AvgJtr and the MaxJtr statistics. A large variance between these statistics might indicate a problem
with jitter on the network or periodic high rates of network activity.
General Telephone Call Problems
The following sections help troubleshoot general telephone call problems.
Phone Call Cannot Be Established
Problem
A user complains about not being able to make a call.
Cause
The phone does not have a DHCP IP address. The phones display the message Configuring IP or
Registering.
Cisco IP Phone 7800 Series Multiplatform Phones Administration Guide
311
Cisco IP Phone Troubleshooting
Audio Problems

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Cisco 7841 Specifications

General IconGeneral
Ethernet SwitchYes
Lines4
Headset PortYes
Wall MountableYes
Display3.5-inch grayscale display
AudioWideband audio
PoEIEEE 802.3af
SpeakerphoneFull-duplex
Ethernet Ports2 x 10/100/1000
Headset JackRJ9
ProtocolsSIP
Codec SupportG.711, G.722, G.729, iLBC
MountingDesk or wall
Weight1 kg

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