Voice On The Ip Phone Is Intermittent - Huawei eSpace 6805 Administrator's Manual

Huawei IP Phone eSpace
6805&6810&6830&6850&6870
Administrator Guide
Figure 4-4 Exception tab page of the firewall
If an IP phone cannot obtain the time from the computer, it is recommended that the SoftCo
be used as the NTP server so that the IP phone obtains the time from the SoftCo. The SoftCo
of V100R001C03 and later one provides the NTP function.
Configuration command on the SoftCo: [%SoftCo9500(config)]$start sntpserver

4.2.13 Voice on the IP Phone Is Intermittent

Problem
The voice on the IP phone is intermittent.
Cause
This fault is caused by the packet loss and jitter:
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Solution
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Issue 01 (2012-06-20)
Packet loss is caused by network congestion or insufficient device capabilities.
The jitter is caused by packet reassembling on the transmission device or receiving
device, such as the timeout processing, retransmission mechanism, and insufficient
buffer.
Improve the network quality.
Change the codec of the IP phone. Generally, the default codec of an IP phone is G.711
A-law/μ-law. If the network quality is low, you can set the codec to G.729AB or G.723.1.
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