Cadence Flash F200-2 Guia de Resolução de Problemas descarregar pdf (Página 60)

60 Troubleshooting

IP Softphone 2050 audio quality

Use the following suggestions to troubleshoot audio quality on the IP

Softphone 2050.

Verifying basic audio operation

To verify the physical connection and proper Windows audio configuration,

record an audio message and play it back using the USB headset.

One-way audio

•

Check that the handsfree option is programmed for the IP Softphone

2050 on the CS 1000.

•

Check if the mute option is turned on. If the mute option is on, the

Mute button appears red on the IP Softphone 2050 interface.

• Check the NAT configuration. You receive one-way audio if the NAT

configuration causes the IP Softphone 2050 to attempt to connect to an

incorrect IP address.

Broken or choppy speech

The Audio Quality slider adjusts the number of buffers between the

computer audio device and the IP Softphone 2050 application. Less delay

reduces the audio delay but increases the chances of getting broken

or absent audio. High quality reduces the chances of broken audio but

increases the audio delay.

If you receive choppy or broken speech, try moving the Audio Quality

slider toward Higher Quality.

The following are other causes for audio quality issues on the IP

Softphone 2050:

• Other applications that run on your computer, especially CPU-intensive

applications or applications that intercept or delay packets (such as

firewalls), can cause broken audio.

• Multiple Ethernet interfaces on a single PC may not work well together.

For example, the IP Softphone 2050 can exhibit intermittent breaks in

audio with notebooks that have a Xircom RealPort Cardbus Ethernet

10/100+Modem 56 PC Card (PCMCIA) inserted when the notebook is

docked. In the case of this PC card, the problem relates to a version

of the Xircom driver.

This driver uses CPU cycles even when it is not active, which, in

turn, causes IP Phone audio to become choppy. Solutions include

upgrading your Xircom driver or removing the PC card when the

notebook is docked. To upgrade your Xircom driver, download and

install a new PC card driver from the Xircom Web site. You require

Nortel Communication Server 1000

Troubleshooting Guide for Distributors

NN43001-730 02.02 31 December 2009

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